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Source: /wp-includes/query.php - 5021 lines - 145294 bytes - Summary - Text - Print

Description: WordPress Query API The query API attempts to get which part of WordPress the user is on. It also provides functionality for getting URL query information.

   1  <?php
   2  /**
   3   * WordPress Query API
   4   *
   5   * The query API attempts to get which part of WordPress the user is on. It
   6   * also provides functionality for getting URL query information.
   7   *
   8   * @link https://codex.wordpress.org/The_Loop More information on The Loop.
   9   *
  10   * @package WordPress
  11   * @subpackage Query
  12   */
  13  
  14  /**
  15   * Retrieve variable in the WP_Query class.
  16   *
  17   * @since 1.5.0
  18   * @since 3.9.0 The `$default` argument was introduced.
  19   *
  20   * @global WP_Query $wp_query Global WP_Query instance.
  21   *
  22   * @param string $var       The variable key to retrieve.
  23   * @param mixed  $default   Optional. Value to return if the query variable is not set. Default empty.
  24   * @return mixed Contents of the query variable.
  25   */
  26  function get_query_var( $var, $default = '' ) {
  27      global $wp_query;
  28      return $wp_query->get( $var, $default );
  29  }
  30  
  31  /**
  32   * Retrieve the currently-queried object.
  33   *
  34   * Wrapper for WP_Query::get_queried_object().
  35   *
  36   * @since 3.1.0
  37   * @access public
  38   *
  39   * @global WP_Query $wp_query Global WP_Query instance.
  40   *
  41   * @return object Queried object.
  42   */
  43  function get_queried_object() {
  44      global $wp_query;
  45      return $wp_query->get_queried_object();
  46  }
  47  
  48  /**
  49   * Retrieve ID of the current queried object.
  50   *
  51   * Wrapper for WP_Query::get_queried_object_id().
  52   *
  53   * @since 3.1.0
  54   *
  55   * @global WP_Query $wp_query Global WP_Query instance.
  56   *
  57   * @return int ID of the queried object.
  58   */
  59  function get_queried_object_id() {
  60      global $wp_query;
  61      return $wp_query->get_queried_object_id();
  62  }
  63  
  64  /**
  65   * Set query variable.
  66   *
  67   * @since 2.2.0
  68   *
  69   * @global WP_Query $wp_query Global WP_Query instance.
  70   *
  71   * @param string $var   Query variable key.
  72   * @param mixed  $value Query variable value.
  73   */
  74  function set_query_var( $var, $value ) {
  75      global $wp_query;
  76      $wp_query->set( $var, $value );
  77  }
  78  
  79  /**
  80   * Sets up The Loop with query parameters.
  81   *
  82   * Note: This function will completely override the main query and isn't intended for use
  83   * by plugins or themes. Its overly-simplistic approach to modifying the main query can be
  84   * problematic and should be avoided wherever possible. In most cases, there are better,
  85   * more performant options for modifying the main query such as via the {@see 'pre_get_posts'}
  86   * action within WP_Query.
  87   *
  88   * This must not be used within the WordPress Loop.
  89   *
  90   * @since 1.5.0
  91   *
  92   * @global WP_Query $wp_query Global WP_Query instance.
  93   *
  94   * @param array|string $query Array or string of WP_Query arguments.
  95   * @return array List of post objects.
  96   */
  97  function query_posts($query) {
  98      $GLOBALS['wp_query'] = new WP_Query();
  99      return $GLOBALS['wp_query']->query($query);
 100  }
 101  
 102  /**
 103   * Destroys the previous query and sets up a new query.
 104   *
 105   * This should be used after query_posts() and before another query_posts().
 106   * This will remove obscure bugs that occur when the previous WP_Query object
 107   * is not destroyed properly before another is set up.
 108   *
 109   * @since 2.3.0
 110   *
 111   * @global WP_Query $wp_query     Global WP_Query instance.
 112   * @global WP_Query $wp_the_query Copy of the global WP_Query instance created during wp_reset_query().
 113   */
 114  function wp_reset_query() {
 115      $GLOBALS['wp_query'] = $GLOBALS['wp_the_query'];
 116      wp_reset_postdata();
 117  }
 118  
 119  /**
 120   * After looping through a separate query, this function restores
 121   * the $post global to the current post in the main query.
 122   *
 123   * @since 3.0.0
 124   *
 125   * @global WP_Query $wp_query Global WP_Query instance.
 126   */
 127  function wp_reset_postdata() {
 128      global $wp_query;
 129  
 130      if ( isset( $wp_query ) ) {
 131          $wp_query->reset_postdata();
 132      }
 133  }
 134  
 135  /*
 136   * Query type checks.
 137   */
 138  
 139  /**
 140   * Is the query for an existing archive page?
 141   *
 142   * Month, Year, Category, Author, Post Type archive...
 143   *
 144   * @since 1.5.0
 145   *
 146   * @global WP_Query $wp_query Global WP_Query instance.
 147   *
 148   * @return bool
 149   */
 150  function is_archive() {
 151      global $wp_query;
 152  
 153      if ( ! isset( $wp_query ) ) {
 154          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 155          return false;
 156      }
 157  
 158      return $wp_query->is_archive();
 159  }
 160  
 161  /**
 162   * Is the query for an existing post type archive page?
 163   *
 164   * @since 3.1.0
 165   *
 166   * @global WP_Query $wp_query Global WP_Query instance.
 167   *
 168   * @param string|array $post_types Optional. Post type or array of posts types to check against.
 169   * @return bool
 170   */
 171  function is_post_type_archive( $post_types = '' ) {
 172      global $wp_query;
 173  
 174      if ( ! isset( $wp_query ) ) {
 175          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 176          return false;
 177      }
 178  
 179      return $wp_query->is_post_type_archive( $post_types );
 180  }
 181  
 182  /**
 183   * Is the query for an existing attachment page?
 184   *
 185   * @since 2.0.0
 186   *
 187   * @global WP_Query $wp_query Global WP_Query instance.
 188   *
 189   * @param int|string|array|object $attachment Attachment ID, title, slug, or array of such.
 190   * @return bool
 191   */
 192  function is_attachment( $attachment = '' ) {
 193      global $wp_query;
 194  
 195      if ( ! isset( $wp_query ) ) {
 196          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 197          return false;
 198      }
 199  
 200      return $wp_query->is_attachment( $attachment );
 201  }
 202  
 203  /**
 204   * Is the query for an existing author archive page?
 205   *
 206   * If the $author parameter is specified, this function will additionally
 207   * check if the query is for one of the authors specified.
 208   *
 209   * @since 1.5.0
 210   *
 211   * @global WP_Query $wp_query Global WP_Query instance.
 212   *
 213   * @param mixed $author Optional. User ID, nickname, nicename, or array of User IDs, nicknames, and nicenames
 214   * @return bool
 215   */
 216  function is_author( $author = '' ) {
 217      global $wp_query;
 218  
 219      if ( ! isset( $wp_query ) ) {
 220          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 221          return false;
 222      }
 223  
 224      return $wp_query->is_author( $author );
 225  }
 226  
 227  /**
 228   * Is the query for an existing category archive page?
 229   *
 230   * If the $category parameter is specified, this function will additionally
 231   * check if the query is for one of the categories specified.
 232   *
 233   * @since 1.5.0
 234   *
 235   * @global WP_Query $wp_query Global WP_Query instance.
 236   *
 237   * @param mixed $category Optional. Category ID, name, slug, or array of Category IDs, names, and slugs.
 238   * @return bool
 239   */
 240  function is_category( $category = '' ) {
 241      global $wp_query;
 242  
 243      if ( ! isset( $wp_query ) ) {
 244          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 245          return false;
 246      }
 247  
 248      return $wp_query->is_category( $category );
 249  }
 250  
 251  /**
 252   * Is the query for an existing tag archive page?
 253   *
 254   * If the $tag parameter is specified, this function will additionally
 255   * check if the query is for one of the tags specified.
 256   *
 257   * @since 2.3.0
 258   *
 259   * @global WP_Query $wp_query Global WP_Query instance.
 260   *
 261   * @param mixed $tag Optional. Tag ID, name, slug, or array of Tag IDs, names, and slugs.
 262   * @return bool
 263   */
 264  function is_tag( $tag = '' ) {
 265      global $wp_query;
 266  
 267      if ( ! isset( $wp_query ) ) {
 268          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 269          return false;
 270      }
 271  
 272      return $wp_query->is_tag( $tag );
 273  }
 274  
 275  /**
 276   * Is the query for an existing custom taxonomy archive page?
 277   *
 278   * If the $taxonomy parameter is specified, this function will additionally
 279   * check if the query is for that specific $taxonomy.
 280   *
 281   * If the $term parameter is specified in addition to the $taxonomy parameter,
 282   * this function will additionally check if the query is for one of the terms
 283   * specified.
 284   *
 285   * @since 2.5.0
 286   *
 287   * @global WP_Query $wp_query Global WP_Query instance.
 288   *
 289   * @param string|array     $taxonomy Optional. Taxonomy slug or slugs.
 290   * @param int|string|array $term     Optional. Term ID, name, slug or array of Term IDs, names, and slugs.
 291   * @return bool True for custom taxonomy archive pages, false for built-in taxonomies (category and tag archives).
 292   */
 293  function is_tax( $taxonomy = '', $term = '' ) {
 294      global $wp_query;
 295  
 296      if ( ! isset( $wp_query ) ) {
 297          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 298          return false;
 299      }
 300  
 301      return $wp_query->is_tax( $taxonomy, $term );
 302  }
 303  
 304  /**
 305   * Is the query for an existing date archive?
 306   *
 307   * @since 1.5.0
 308   *
 309   * @global WP_Query $wp_query Global WP_Query instance.
 310   *
 311   * @return bool
 312   */
 313  function is_date() {
 314      global $wp_query;
 315  
 316      if ( ! isset( $wp_query ) ) {
 317          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 318          return false;
 319      }
 320  
 321      return $wp_query->is_date();
 322  }
 323  
 324  /**
 325   * Is the query for an existing day archive?
 326   *
 327   * @since 1.5.0
 328   *
 329   * @global WP_Query $wp_query Global WP_Query instance.
 330   *
 331   * @return bool
 332   */
 333  function is_day() {
 334      global $wp_query;
 335  
 336      if ( ! isset( $wp_query ) ) {
 337          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 338          return false;
 339      }
 340  
 341      return $wp_query->is_day();
 342  }
 343  
 344  /**
 345   * Is the query for a feed?
 346   *
 347   * @since 1.5.0
 348   *
 349   * @global WP_Query $wp_query Global WP_Query instance.
 350   *
 351   * @param string|array $feeds Optional feed types to check.
 352   * @return bool
 353   */
 354  function is_feed( $feeds = '' ) {
 355      global $wp_query;
 356  
 357      if ( ! isset( $wp_query ) ) {
 358          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 359          return false;
 360      }
 361  
 362      return $wp_query->is_feed( $feeds );
 363  }
 364  
 365  /**
 366   * Is the query for a comments feed?
 367   *
 368   * @since 3.0.0
 369   *
 370   * @global WP_Query $wp_query Global WP_Query instance.
 371   *
 372   * @return bool
 373   */
 374  function is_comment_feed() {
 375      global $wp_query;
 376  
 377      if ( ! isset( $wp_query ) ) {
 378          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 379          return false;
 380      }
 381  
 382      return $wp_query->is_comment_feed();
 383  }
 384  
 385  /**
 386   * Is the query for the front page of the site?
 387   *
 388   * This is for what is displayed at your site's main URL.
 389   *
 390   * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_on_front'.
 391   *
 392   * If you set a static page for the front page of your site, this function will return
 393   * true when viewing that page.
 394   *
 395   * Otherwise the same as @see is_home()
 396   *
 397   * @since 2.5.0
 398   *
 399   * @global WP_Query $wp_query Global WP_Query instance.
 400   *
 401   * @return bool True, if front of site.
 402   */
 403  function is_front_page() {
 404      global $wp_query;
 405  
 406      if ( ! isset( $wp_query ) ) {
 407          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 408          return false;
 409      }
 410  
 411      return $wp_query->is_front_page();
 412  }
 413  
 414  /**
 415   * Determines if the query is for the blog homepage.
 416   *
 417   * The blog homepage is the page that shows the time-based blog content of the site.
 418   *
 419   * is_home() is dependent on the site's "Front page displays" Reading Settings 'show_on_front'
 420   * and 'page_for_posts'.
 421   *
 422   * If a static page is set for the front page of the site, this function will return true only
 423   * on the page you set as the "Posts page".
 424   *
 425   * @since 1.5.0
 426   *
 427   * @see is_front_page()
 428   * @global WP_Query $wp_query Global WP_Query instance.
 429   *
 430   * @return bool True if blog view homepage, otherwise false.
 431   */
 432  function is_home() {
 433      global $wp_query;
 434  
 435      if ( ! isset( $wp_query ) ) {
 436          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 437          return false;
 438      }
 439  
 440      return $wp_query->is_home();
 441  }
 442  
 443  /**
 444   * Is the query for an existing month archive?
 445   *
 446   * @since 1.5.0
 447   *
 448   * @global WP_Query $wp_query Global WP_Query instance.
 449   *
 450   * @return bool
 451   */
 452  function is_month() {
 453      global $wp_query;
 454  
 455      if ( ! isset( $wp_query ) ) {
 456          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 457          return false;
 458      }
 459  
 460      return $wp_query->is_month();
 461  }
 462  
 463  /**
 464   * Is the query for an existing single page?
 465   *
 466   * If the $page parameter is specified, this function will additionally
 467   * check if the query is for one of the pages specified.
 468   *
 469   * @see is_single()
 470   * @see is_singular()
 471   *
 472   * @since 1.5.0
 473   *
 474   * @global WP_Query $wp_query Global WP_Query instance.
 475   *
 476   * @param int|string|array $page Optional. Page ID, title, slug, or array of such. Default empty.
 477   * @return bool Whether the query is for an existing single page.
 478   */
 479  function is_page( $page = '' ) {
 480      global $wp_query;
 481  
 482      if ( ! isset( $wp_query ) ) {
 483          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 484          return false;
 485      }
 486  
 487      return $wp_query->is_page( $page );
 488  }
 489  
 490  /**
 491   * Is the query for paged result and not for the first page?
 492   *
 493   * @since 1.5.0
 494   *
 495   * @global WP_Query $wp_query Global WP_Query instance.
 496   *
 497   * @return bool
 498   */
 499  function is_paged() {
 500      global $wp_query;
 501  
 502      if ( ! isset( $wp_query ) ) {
 503          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 504          return false;
 505      }
 506  
 507      return $wp_query->is_paged();
 508  }
 509  
 510  /**
 511   * Is the query for a post or page preview?
 512   *
 513   * @since 2.0.0
 514   *
 515   * @global WP_Query $wp_query Global WP_Query instance.
 516   *
 517   * @return bool
 518   */
 519  function is_preview() {
 520      global $wp_query;
 521  
 522      if ( ! isset( $wp_query ) ) {
 523          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 524          return false;
 525      }
 526  
 527      return $wp_query->is_preview();
 528  }
 529  
 530  /**
 531   * Is the query for the robots file?
 532   *
 533   * @since 2.1.0
 534   *
 535   * @global WP_Query $wp_query Global WP_Query instance.
 536   *
 537   * @return bool
 538   */
 539  function is_robots() {
 540      global $wp_query;
 541  
 542      if ( ! isset( $wp_query ) ) {
 543          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 544          return false;
 545      }
 546  
 547      return $wp_query->is_robots();
 548  }
 549  
 550  /**
 551   * Is the query for a search?
 552   *
 553   * @since 1.5.0
 554   *
 555   * @global WP_Query $wp_query Global WP_Query instance.
 556   *
 557   * @return bool
 558   */
 559  function is_search() {
 560      global $wp_query;
 561  
 562      if ( ! isset( $wp_query ) ) {
 563          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 564          return false;
 565      }
 566  
 567      return $wp_query->is_search();
 568  }
 569  
 570  /**
 571   * Is the query for an existing single post?
 572   *
 573   * Works for any post type, except attachments and pages
 574   *
 575   * If the $post parameter is specified, this function will additionally
 576   * check if the query is for one of the Posts specified.
 577   *
 578   * @see is_page()
 579   * @see is_singular()
 580   *
 581   * @since 1.5.0
 582   *
 583   * @global WP_Query $wp_query Global WP_Query instance.
 584   *
 585   * @param int|string|array $post Optional. Post ID, title, slug, or array of such. Default empty.
 586   * @return bool Whether the query is for an existing single post.
 587   */
 588  function is_single( $post = '' ) {
 589      global $wp_query;
 590  
 591      if ( ! isset( $wp_query ) ) {
 592          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 593          return false;
 594      }
 595  
 596      return $wp_query->is_single( $post );
 597  }
 598  
 599  /**
 600   * Is the query for an existing single post of any post type (post, attachment, page, ... )?
 601   *
 602   * If the $post_types parameter is specified, this function will additionally
 603   * check if the query is for one of the Posts Types specified.
 604   *
 605   * @see is_page()
 606   * @see is_single()
 607   *
 608   * @since 1.5.0
 609   *
 610   * @global WP_Query $wp_query Global WP_Query instance.
 611   *
 612   * @param string|array $post_types Optional. Post type or array of post types. Default empty.
 613   * @return bool Whether the query is for an existing single post of any of the given post types.
 614   */
 615  function is_singular( $post_types = '' ) {
 616      global $wp_query;
 617  
 618      if ( ! isset( $wp_query ) ) {
 619          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 620          return false;
 621      }
 622  
 623      return $wp_query->is_singular( $post_types );
 624  }
 625  
 626  /**
 627   * Is the query for a specific time?
 628   *
 629   * @since 1.5.0
 630   *
 631   * @global WP_Query $wp_query Global WP_Query instance.
 632   *
 633   * @return bool
 634   */
 635  function is_time() {
 636      global $wp_query;
 637  
 638      if ( ! isset( $wp_query ) ) {
 639          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 640          return false;
 641      }
 642  
 643      return $wp_query->is_time();
 644  }
 645  
 646  /**
 647   * Is the query for a trackback endpoint call?
 648   *
 649   * @since 1.5.0
 650   *
 651   * @global WP_Query $wp_query Global WP_Query instance.
 652   *
 653   * @return bool
 654   */
 655  function is_trackback() {
 656      global $wp_query;
 657  
 658      if ( ! isset( $wp_query ) ) {
 659          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 660          return false;
 661      }
 662  
 663      return $wp_query->is_trackback();
 664  }
 665  
 666  /**
 667   * Is the query for an existing year archive?
 668   *
 669   * @since 1.5.0
 670   *
 671   * @global WP_Query $wp_query Global WP_Query instance.
 672   *
 673   * @return bool
 674   */
 675  function is_year() {
 676      global $wp_query;
 677  
 678      if ( ! isset( $wp_query ) ) {
 679          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 680          return false;
 681      }
 682  
 683      return $wp_query->is_year();
 684  }
 685  
 686  /**
 687   * Is the query a 404 (returns no results)?
 688   *
 689   * @since 1.5.0
 690   *
 691   * @global WP_Query $wp_query Global WP_Query instance.
 692   *
 693   * @return bool
 694   */
 695  function is_404() {
 696      global $wp_query;
 697  
 698      if ( ! isset( $wp_query ) ) {
 699          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 700          return false;
 701      }
 702  
 703      return $wp_query->is_404();
 704  }
 705  
 706  /**
 707   * Is the query for an embedded post?
 708   *
 709   * @since 4.4.0
 710   *
 711   * @global WP_Query $wp_query Global WP_Query instance.
 712   *
 713   * @return bool Whether we're in an embedded post or not.
 714   */
 715  function is_embed() {
 716      global $wp_query;
 717  
 718      if ( ! isset( $wp_query ) ) {
 719          _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
 720          return false;
 721      }
 722  
 723      return $wp_query->is_embed();
 724  }
 725  
 726  /**
 727   * Is the query the main query?
 728   *
 729   * @since 3.3.0
 730   *
 731   * @global WP_Query $wp_query Global WP_Query instance.
 732   *
 733   * @return bool
 734   */
 735  function is_main_query() {
 736      if ( 'pre_get_posts' === current_filter() ) {
 737          $message = sprintf(
 738              /* translators: 1: pre_get_posts 2: WP_Query->is_main_query() 3: is_main_query() 4: link to codex is_main_query() page. */
 739              __( 'In %1$s, use the %2$s method, not the %3$s function. See %4$s.' ),
 740              '<code>pre_get_posts</code>',
 741              '<code>WP_Query->is_main_query()</code>',
 742              '<code>is_main_query()</code>',
 743              __( 'https://codex.wordpress.org/Function_Reference/is_main_query' )
 744          );
 745          _doing_it_wrong( __FUNCTION__, $message, '3.7.0' );
 746      }
 747  
 748      global $wp_query;
 749      return $wp_query->is_main_query();
 750  }
 751  
 752  /*
 753   * The Loop. Post loop control.
 754   */
 755  
 756  /**
 757   * Whether current WordPress query has results to loop over.
 758   *
 759   * @since 1.5.0
 760   *
 761   * @global WP_Query $wp_query Global WP_Query instance.
 762   *
 763   * @return bool
 764   */
 765  function have_posts() {
 766      global $wp_query;
 767      return $wp_query->have_posts();
 768  }
 769  
 770  /**
 771   * Whether the caller is in the Loop.
 772   *
 773   * @since 2.0.0
 774   *
 775   * @global WP_Query $wp_query Global WP_Query instance.
 776   *
 777   * @return bool True if caller is within loop, false if loop hasn't started or ended.
 778   */
 779  function in_the_loop() {
 780      global $wp_query;
 781      return $wp_query->in_the_loop;
 782  }
 783  
 784  /**
 785   * Rewind the loop posts.
 786   *
 787   * @since 1.5.0
 788   *
 789   * @global WP_Query $wp_query Global WP_Query instance.
 790   */
 791  function rewind_posts() {
 792      global $wp_query;
 793      $wp_query->rewind_posts();
 794  }
 795  
 796  /**
 797   * Iterate the post index in the loop.
 798   *
 799   * @since 1.5.0
 800   *
 801   * @global WP_Query $wp_query Global WP_Query instance.
 802   */
 803  function the_post() {
 804      global $wp_query;
 805      $wp_query->the_post();
 806  }
 807  
 808  /*
 809   * Comments loop.
 810   */
 811  
 812  /**
 813   * Whether there are comments to loop over.
 814   *
 815   * @since 2.2.0
 816   *
 817   * @global WP_Query $wp_query Global WP_Query instance.
 818   *
 819   * @return bool
 820   */
 821  function have_comments() {
 822      global $wp_query;
 823      return $wp_query->have_comments();
 824  }
 825  
 826  /**
 827   * Iterate comment index in the comment loop.
 828   *
 829   * @since 2.2.0
 830   *
 831   * @global WP_Query $wp_query Global WP_Query instance.
 832   *
 833   * @return object
 834   */
 835  function the_comment() {
 836      global $wp_query;
 837      return $wp_query->the_comment();
 838  }
 839  
 840  /*
 841   * WP_Query
 842   */
 843  
 844  /**
 845   * The WordPress Query class.
 846   *
 847   * @link https://codex.wordpress.org/Function_Reference/WP_Query Codex page.
 848   *
 849   * @since 1.5.0
 850   * @since 4.5.0 Removed the `$comments_popup` property.
 851   */
 852  class WP_Query {
 853  
 854      /**
 855       * Query vars set by the user
 856       *
 857       * @since 1.5.0
 858       * @access public
 859       * @var array
 860       */
 861      public $query;
 862  
 863      /**
 864       * Query vars, after parsing
 865       *
 866       * @since 1.5.0
 867       * @access public
 868       * @var array
 869       */
 870      public $query_vars = array();
 871  
 872      /**
 873       * Taxonomy query, as passed to get_tax_sql()
 874       *
 875       * @since 3.1.0
 876       * @access public
 877       * @var object WP_Tax_Query
 878       */
 879      public $tax_query;
 880  
 881      /**
 882       * Metadata query container
 883       *
 884       * @since 3.2.0
 885       * @access public
 886       * @var object WP_Meta_Query
 887       */
 888      public $meta_query = false;
 889  
 890      /**
 891       * Date query container
 892       *
 893       * @since 3.7.0
 894       * @access public
 895       * @var object WP_Date_Query
 896       */
 897      public $date_query = false;
 898  
 899      /**
 900       * Holds the data for a single object that is queried.
 901       *
 902       * Holds the contents of a post, page, category, attachment.
 903       *
 904       * @since 1.5.0
 905       * @access public
 906       * @var object|array
 907       */
 908      public $queried_object;
 909  
 910      /**
 911       * The ID of the queried object.
 912       *
 913       * @since 1.5.0
 914       * @access public
 915       * @var int
 916       */
 917      public $queried_object_id;
 918  
 919      /**
 920       * Get post database query.
 921       *
 922       * @since 2.0.1
 923       * @access public
 924       * @var string
 925       */
 926      public $request;
 927  
 928      /**
 929       * List of posts.
 930       *
 931       * @since 1.5.0
 932       * @access public
 933       * @var array
 934       */
 935      public $posts;
 936  
 937      /**
 938       * The amount of posts for the current query.
 939       *
 940       * @since 1.5.0
 941       * @access public
 942       * @var int
 943       */
 944      public $post_count = 0;
 945  
 946      /**
 947       * Index of the current item in the loop.
 948       *
 949       * @since 1.5.0
 950       * @access public
 951       * @var int
 952       */
 953      public $current_post = -1;
 954  
 955      /**
 956       * Whether the loop has started and the caller is in the loop.
 957       *
 958       * @since 2.0.0
 959       * @access public
 960       * @var bool
 961       */
 962      public $in_the_loop = false;
 963  
 964      /**
 965       * The current post.
 966       *
 967       * @since 1.5.0
 968       * @access public
 969       * @var WP_Post
 970       */
 971      public $post;
 972  
 973      /**
 974       * The list of comments for current post.
 975       *
 976       * @since 2.2.0
 977       * @access public
 978       * @var array
 979       */
 980      public $comments;
 981  
 982      /**
 983       * The amount of comments for the posts.
 984       *
 985       * @since 2.2.0
 986       * @access public
 987       * @var int
 988       */
 989      public $comment_count = 0;
 990  
 991      /**
 992       * The index of the comment in the comment loop.
 993       *
 994       * @since 2.2.0
 995       * @access public
 996       * @var int
 997       */
 998      public $current_comment = -1;
 999  
1000      /**
1001       * Current comment ID.
1002       *
1003       * @since 2.2.0
1004       * @access public
1005       * @var int
1006       */
1007      public $comment;
1008  
1009      /**
1010       * The amount of found posts for the current query.
1011       *
1012       * If limit clause was not used, equals $post_count.
1013       *
1014       * @since 2.1.0
1015       * @access public
1016       * @var int
1017       */
1018      public $found_posts = 0;
1019  
1020      /**
1021       * The amount of pages.
1022       *
1023       * @since 2.1.0
1024       * @access public
1025       * @var int
1026       */
1027      public $max_num_pages = 0;
1028  
1029      /**
1030       * The amount of comment pages.
1031       *
1032       * @since 2.7.0
1033       * @access public
1034       * @var int
1035       */
1036      public $max_num_comment_pages = 0;
1037  
1038      /**
1039       * Set if query is single post.
1040       *
1041       * @since 1.5.0
1042       * @access public
1043       * @var bool
1044       */
1045      public $is_single = false;
1046  
1047      /**
1048       * Set if query is preview of blog.
1049       *
1050       * @since 2.0.0
1051       * @access public
1052       * @var bool
1053       */
1054      public $is_preview = false;
1055  
1056      /**
1057       * Set if query returns a page.
1058       *
1059       * @since 1.5.0
1060       * @access public
1061       * @var bool
1062       */
1063      public $is_page = false;
1064  
1065      /**
1066       * Set if query is an archive list.
1067       *
1068       * @since 1.5.0
1069       * @access public
1070       * @var bool
1071       */
1072      public $is_archive = false;
1073  
1074      /**
1075       * Set if query is part of a date.
1076       *
1077       * @since 1.5.0
1078       * @access public
1079       * @var bool
1080       */
1081      public $is_date = false;
1082  
1083      /**
1084       * Set if query contains a year.
1085       *
1086       * @since 1.5.0
1087       * @access public
1088       * @var bool
1089       */
1090      public $is_year = false;
1091  
1092      /**
1093       * Set if query contains a month.
1094       *
1095       * @since 1.5.0
1096       * @access public
1097       * @var bool
1098       */
1099      public $is_month = false;
1100  
1101      /**
1102       * Set if query contains a day.
1103       *
1104       * @since 1.5.0
1105       * @access public
1106       * @var bool
1107       */
1108      public $is_day = false;
1109  
1110      /**
1111       * Set if query contains time.
1112       *
1113       * @since 1.5.0
1114       * @access public
1115       * @var bool
1116       */
1117      public $is_time = false;
1118  
1119      /**
1120       * Set if query contains an author.
1121       *
1122       * @since 1.5.0
1123       * @access public
1124       * @var bool
1125       */
1126      public $is_author = false;
1127  
1128      /**
1129       * Set if query contains category.
1130       *
1131       * @since 1.5.0
1132       * @access public
1133       * @var bool
1134       */
1135      public $is_category = false;
1136  
1137      /**
1138       * Set if query contains tag.
1139       *
1140       * @since 2.3.0
1141       * @access public
1142       * @var bool
1143       */
1144      public $is_tag = false;
1145  
1146      /**
1147       * Set if query contains taxonomy.
1148       *
1149       * @since 2.5.0
1150       * @access public
1151       * @var bool
1152       */
1153      public $is_tax = false;
1154  
1155      /**
1156       * Set if query was part of a search result.
1157       *
1158       * @since 1.5.0
1159       * @access public
1160       * @var bool
1161       */
1162      public $is_search = false;
1163  
1164      /**
1165       * Set if query is feed display.
1166       *
1167       * @since 1.5.0
1168       * @access public
1169       * @var bool
1170       */
1171      public $is_feed = false;
1172  
1173      /**
1174       * Set if query is comment feed display.
1175       *
1176       * @since 2.2.0
1177       * @access public
1178       * @var bool
1179       */
1180      public $is_comment_feed = false;
1181  
1182      /**
1183       * Set if query is trackback.
1184       *
1185       * @since 1.5.0
1186       * @access public
1187       * @var bool
1188       */
1189      public $is_trackback = false;
1190  
1191      /**
1192       * Set if query is blog homepage.
1193       *
1194       * @since 1.5.0
1195       * @access public
1196       * @var bool
1197       */
1198      public $is_home = false;
1199  
1200      /**
1201       * Set if query couldn't found anything.
1202       *
1203       * @since 1.5.0
1204       * @access public
1205       * @var bool
1206       */
1207      public $is_404 = false;
1208  
1209      /**
1210       * Set if query is embed.
1211       *
1212       * @since 4.4.0
1213       * @access public
1214       * @var bool
1215       */
1216      public $is_embed = false;
1217  
1218      /**
1219       * Set if query is paged
1220       *
1221       * @since 1.5.0
1222       * @access public
1223       * @var bool
1224       */
1225      public $is_paged = false;
1226  
1227      /**
1228       * Set if query is part of administration page.
1229       *
1230       * @since 1.5.0
1231       * @access public
1232       * @var bool
1233       */
1234      public $is_admin = false;
1235  
1236      /**
1237       * Set if query is an attachment.
1238       *
1239       * @since 2.0.0
1240       * @access public
1241       * @var bool
1242       */
1243      public $is_attachment = false;
1244  
1245      /**
1246       * Set if is single, is a page, or is an attachment.
1247       *
1248       * @since 2.1.0
1249       * @access public
1250       * @var bool
1251       */
1252      public $is_singular = false;
1253  
1254      /**
1255       * Set if query is for robots.
1256       *
1257       * @since 2.1.0
1258       * @access public
1259       * @var bool
1260       */
1261      public $is_robots = false;
1262  
1263      /**
1264       * Set if query contains posts.
1265       *
1266       * Basically, the homepage if the option isn't set for the static homepage.
1267       *
1268       * @since 2.1.0
1269       * @access public
1270       * @var bool
1271       */
1272      public $is_posts_page = false;
1273  
1274      /**
1275       * Set if query is for a post type archive.
1276       *
1277       * @since 3.1.0
1278       * @access public
1279       * @var bool
1280       */
1281      public $is_post_type_archive = false;
1282  
1283      /**
1284       * Stores the ->query_vars state like md5(serialize( $this->query_vars ) ) so we know
1285       * whether we have to re-parse because something has changed
1286       *
1287       * @since 3.1.0
1288       * @access private
1289       * @var bool|string
1290       */
1291      private $query_vars_hash = false;
1292  
1293      /**
1294       * Whether query vars have changed since the initial parse_query() call. Used to catch modifications to query vars made
1295       * via pre_get_posts hooks.
1296       *
1297       * @since 3.1.1
1298       * @access private
1299       */
1300      private $query_vars_changed = true;
1301  
1302      /**
1303       * Set if post thumbnails are cached
1304       *
1305       * @since 3.2.0
1306       * @access public
1307       * @var bool
1308       */
1309       public $thumbnails_cached = false;
1310  
1311      /**
1312       * Cached list of search stopwords.
1313       *
1314       * @since 3.7.0
1315       * @var array
1316       */
1317      private $stopwords;
1318  
1319      private $compat_fields = array( 'query_vars_hash', 'query_vars_changed' );
1320  
1321      private $compat_methods = array( 'init_query_flags', 'parse_tax_query' );
1322  
1323      /**
1324       * Resets query flags to false.
1325       *
1326       * The query flags are what page info WordPress was able to figure out.
1327       *
1328       * @since 2.0.0
1329       * @access private
1330       */
1331  	private function init_query_flags() {
1332          $this->is_single = false;
1333          $this->is_preview = false;
1334          $this->is_page = false;
1335          $this->is_archive = false;
1336          $this->is_date = false;
1337          $this->is_year = false;
1338          $this->is_month = false;
1339          $this->is_day = false;
1340          $this->is_time = false;
1341          $this->is_author = false;
1342          $this->is_category = false;
1343          $this->is_tag = false;
1344          $this->is_tax = false;
1345          $this->is_search = false;
1346          $this->is_feed = false;
1347          $this->is_comment_feed = false;
1348          $this->is_trackback = false;
1349          $this->is_home = false;
1350          $this->is_404 = false;
1351          $this->is_paged = false;
1352          $this->is_admin = false;
1353          $this->is_attachment = false;
1354          $this->is_singular = false;
1355          $this->is_robots = false;
1356          $this->is_posts_page = false;
1357          $this->is_post_type_archive = false;
1358      }
1359  
1360      /**
1361       * Initiates object properties and sets default values.
1362       *
1363       * @since 1.5.0
1364       * @access public
1365       */
1366  	public function init() {
1367          unset($this->posts);
1368          unset($this->query);
1369          $this->query_vars = array();
1370          unset($this->queried_object);
1371          unset($this->queried_object_id);
1372          $this->post_count = 0;
1373          $this->current_post = -1;
1374          $this->in_the_loop = false;
1375          unset( $this->request );
1376          unset( $this->post );
1377          unset( $this->comments );
1378          unset( $this->comment );
1379          $this->comment_count = 0;
1380          $this->current_comment = -1;
1381          $this->found_posts = 0;
1382          $this->max_num_pages = 0;
1383          $this->max_num_comment_pages = 0;
1384  
1385          $this->init_query_flags();
1386      }
1387  
1388      /**
1389       * Reparse the query vars.
1390       *
1391       * @since 1.5.0
1392       * @access public
1393       */
1394  	public function parse_query_vars() {
1395          $this->parse_query();
1396      }
1397  
1398      /**
1399       * Fills in the query variables, which do not exist within the parameter.
1400       *
1401       * @since 2.1.0
1402       * @since 4.4.0 Removed the `comments_popup` public query variable.
1403       * @access public
1404       *
1405       * @param array $array Defined query variables.
1406       * @return array Complete query variables with undefined ones filled in empty.
1407       */
1408  	public function fill_query_vars($array) {
1409          $keys = array(
1410              'error'
1411              , 'm'
1412              , 'p'
1413              , 'post_parent'
1414              , 'subpost'
1415              , 'subpost_id'
1416              , 'attachment'
1417              , 'attachment_id'
1418              , 'name'
1419              , 'static'
1420              , 'pagename'
1421              , 'page_id'
1422              , 'second'
1423              , 'minute'
1424              , 'hour'
1425              , 'day'
1426              , 'monthnum'
1427              , 'year'
1428              , 'w'
1429              , 'category_name'
1430              , 'tag'
1431              , 'cat'
1432              , 'tag_id'
1433              , 'author'
1434              , 'author_name'
1435              , 'feed'
1436              , 'tb'
1437              , 'paged'
1438              , 'meta_key'
1439              , 'meta_value'
1440              , 'preview'
1441              , 's'
1442              , 'sentence'
1443              , 'title'
1444              , 'fields'
1445              , 'menu_order'
1446              , 'embed'
1447          );
1448  
1449          foreach ( $keys as $key ) {
1450              if ( !isset($array[$key]) )
1451                  $array[$key] = '';
1452          }
1453  
1454          $array_keys = array( 'category__in', 'category__not_in', 'category__and', 'post__in', 'post__not_in', 'post_name__in',
1455              'tag__in', 'tag__not_in', 'tag__and', 'tag_slug__in', 'tag_slug__and', 'post_parent__in', 'post_parent__not_in',
1456              'author__in', 'author__not_in' );
1457  
1458          foreach ( $array_keys as $key ) {
1459              if ( !isset($array[$key]) )
1460                  $array[$key] = array();
1461          }
1462          return $array;
1463      }
1464  
1465      /**
1466       * Parse a query string and set query type booleans.
1467       *
1468       * @since 1.5.0
1469       * @since 4.2.0 Introduced the ability to order by specific clauses of a `$meta_query`, by passing the clause's
1470       *              array key to `$orderby`.
1471       * @since 4.4.0 Introduced `$post_name__in` and `$title` parameters. `$s` was updated to support excluded
1472       *              search terms, by prepending a hyphen.
1473       * @since 4.5.0 Removed the `$comments_popup` parameter.
1474       *              Introduced the `$comment_status` and `$ping_status` parameters.
1475       *              Introduced `RAND(x)` syntax for `$orderby`, which allows an integer seed value to random sorts.
1476       * @since 4.6.0 Added 'post_name__in' support for `$orderby`. Introduced the `$lazy_load_term_meta` argument.
1477       * @access public
1478       *
1479       * @param string|array $query {
1480       *     Optional. Array or string of Query parameters.
1481       *
1482       *     @type int          $attachment_id           Attachment post ID. Used for 'attachment' post_type.
1483       *     @type int|string   $author                  Author ID, or comma-separated list of IDs.
1484       *     @type string       $author_name             User 'user_nicename'.
1485       *     @type array        $author__in              An array of author IDs to query from.
1486       *     @type array        $author__not_in          An array of author IDs not to query from.
1487       *     @type bool         $cache_results           Whether to cache post information. Default true.
1488       *     @type int|string   $cat                     Category ID or comma-separated list of IDs (this or any children).
1489       *     @type array        $category__and           An array of category IDs (AND in).
1490       *     @type array        $category__in            An array of category IDs (OR in, no children).
1491       *     @type array        $category__not_in        An array of category IDs (NOT in).
1492       *     @type string       $category_name           Use category slug (not name, this or any children).
1493       *     @type string       $comment_status          Comment status.
1494       *     @type int          $comments_per_page       The number of comments to return per page.
1495       *                                                 Default 'comments_per_page' option.
1496       *     @type array        $date_query              An associative array of WP_Date_Query arguments.
1497       *                                                 See WP_Date_Query::__construct().
1498       *     @type int          $day                     Day of the month. Default empty. Accepts numbers 1-31.
1499       *     @type bool         $exact                   Whether to search by exact keyword. Default false.
1500       *     @type string|array $fields                  Which fields to return. Single field or all fields (string),
1501       *                                                 or array of fields. 'id=>parent' uses 'id' and 'post_parent'.
1502       *                                                 Default all fields. Accepts 'ids', 'id=>parent'.
1503       *     @type int          $hour                    Hour of the day. Default empty. Accepts numbers 0-23.
1504       *     @type int|bool     $ignore_sticky_posts     Whether to ignore sticky posts or not. Setting this to false
1505       *                                                 excludes stickies from 'post__in'. Accepts 1|true, 0|false.
1506       *                                                 Default 0|false.
1507       *     @type int          $m                       Combination YearMonth. Accepts any four-digit year and month
1508       *                                                 numbers 1-12. Default empty.
1509       *     @type string       $meta_compare            Comparison operator to test the 'meta_value'.
1510       *     @type string       $meta_key                Custom field key.
1511       *     @type array        $meta_query              An associative array of WP_Meta_Query arguments. See WP_Meta_Query.
1512       *     @type string       $meta_value              Custom field value.
1513       *     @type int          $meta_value_num          Custom field value number.
1514       *     @type int          $menu_order              The menu order of the posts.
1515       *     @type int          $monthnum                The two-digit month. Default empty. Accepts numbers 1-12.
1516       *     @type string       $name                    Post slug.
1517       *     @type bool         $nopaging                Show all posts (true) or paginate (false). Default false.
1518       *     @type bool         $no_found_rows           Whether to skip counting the total rows found. Enabling can improve
1519       *                                                 performance. Default false.
1520       *     @type int          $offset                  The number of posts to offset before retrieval.
1521       *     @type string       $order                   Designates ascending or descending order of posts. Default 'DESC'.
1522       *                                                 Accepts 'ASC', 'DESC'.
1523       *     @type string|array $orderby                 Sort retrieved posts by parameter. One or more options may be
1524       *                                                 passed. To use 'meta_value', or 'meta_value_num',
1525       *                                                 'meta_key=keyname' must be also be defined. To sort by a
1526       *                                                 specific `$meta_query` clause, use that clause's array key.
1527       *                                                 Default 'date'. Accepts 'none', 'name', 'author', 'date',
1528       *                                                 'title', 'modified', 'menu_order', 'parent', 'ID', 'rand',
1529       *                                                 'RAND(x)' (where 'x' is an integer seed value),
1530       *                                                 'comment_count', 'meta_value', 'meta_value_num', 'post__in',
1531       *                                                 'post_name__in', 'post_parent__in', and the array keys
1532       *                                                 of `$meta_query`.
1533       *     @type int          $p                       Post ID.
1534       *     @type int          $page                    Show the number of posts that would show up on page X of a
1535       *                                                 static front page.
1536       *     @type int          $paged                   The number of the current page.
1537       *     @type int          $page_id                 Page ID.
1538       *     @type string       $pagename                Page slug.
1539       *     @type string       $perm                    Show posts if user has the appropriate capability.
1540       *     @type string       $ping_status             Ping status.
1541       *     @type array        $post__in                An array of post IDs to retrieve, sticky posts will be included
1542       *     @type string       $post_mime_type          The mime type of the post. Used for 'attachment' post_type.
1543       *     @type array        $post__not_in            An array of post IDs not to retrieve. Note: a string of comma-
1544       *                                                 separated IDs will NOT work.
1545       *     @type int          $post_parent             Page ID to retrieve child pages for. Use 0 to only retrieve
1546       *                                                 top-level pages.
1547       *     @type array        $post_parent__in         An array containing parent page IDs to query child pages from.
1548       *     @type array        $post_parent__not_in     An array containing parent page IDs not to query child pages from.
1549       *     @type string|array $post_type               A post type slug (string) or array of post type slugs.
1550       *                                                 Default 'any' if using 'tax_query'.
1551       *     @type string|array $post_status             A post status (string) or array of post statuses.
1552       *     @type int          $posts_per_page          The number of posts to query for. Use -1 to request all posts.
1553       *     @type int          $posts_per_archive_page  The number of posts to query for by archive page. Overrides
1554       *                                                 'posts_per_page' when is_archive(), or is_search() are true.
1555       *     @type array        $post_name__in           An array of post slugs that results must match.
1556       *     @type string       $s                       Search keyword(s). Prepending a term with a hyphen will
1557       *                                                 exclude posts matching that term. Eg, 'pillow -sofa' will
1558       *                                                 return posts containing 'pillow' but not 'sofa'.
1559       *     @type int          $second                  Second of the minute. Default empty. Accepts numbers 0-60.
1560       *     @type bool         $sentence                Whether to search by phrase. Default false.
1561       *     @type bool         $suppress_filters        Whether to suppress filters. Default false.
1562       *     @type string       $tag                     Tag slug. Comma-separated (either), Plus-separated (all).
1563       *     @type array        $tag__and                An array of tag ids (AND in).
1564       *     @type array        $tag__in                 An array of tag ids (OR in).
1565       *     @type array        $tag__not_in             An array of tag ids (NOT in).
1566       *     @type int          $tag_id                  Tag id or comma-separated list of IDs.
1567       *     @type array        $tag_slug__and           An array of tag slugs (AND in).
1568       *     @type array        $tag_slug__in            An array of tag slugs (OR in). unless 'ignore_sticky_posts' is
1569       *                                                 true. Note: a string of comma-separated IDs will NOT work.
1570       *     @type array        $tax_query               An associative array of WP_Tax_Query arguments.
1571       *                                                 See WP_Tax_Query->queries.
1572       *     @type string       $title                   Post title.
1573       *     @type bool         $update_post_meta_cache  Whether to update the post meta cache. Default true.
1574       *     @type bool         $update_post_term_cache  Whether to update the post term cache. Default true.
1575       *     @type bool         $lazy_load_term_meta     Whether to lazy-load term meta. Setting to false will
1576       *                                                 disable cache priming for term meta, so that each
1577       *                                                 get_term_meta() call will hit the database.
1578       *                                                 Defaults to the value of `$update_post_term_cache`.
1579       *     @type int          $w                       The week number of the year. Default empty. Accepts numbers 0-53.
1580       *     @type int          $year                    The four-digit year. Default empty. Accepts any four-digit year.
1581       * }
1582       */
1583  	public function parse_query( $query =  '' ) {
1584          if ( ! empty( $query ) ) {
1585              $this->init();
1586              $this->query = $this->query_vars = wp_parse_args( $query );
1587          } elseif ( ! isset( $this->query ) ) {
1588              $this->query = $this->query_vars;
1589          }
1590  
1591          $this->query_vars = $this->fill_query_vars($this->query_vars);
1592          $qv = &$this->query_vars;
1593          $this->query_vars_changed = true;
1594  
1595          if ( ! empty($qv['robots']) )
1596              $this->is_robots = true;
1597  
1598          $qv['p'] =  absint($qv['p']);
1599          $qv['page_id'] =  absint($qv['page_id']);
1600          $qv['year'] = absint($qv['year']);
1601          $qv['monthnum'] = absint($qv['monthnum']);
1602          $qv['day'] = absint($qv['day']);
1603          $qv['w'] = absint($qv['w']);
1604          $qv['m'] = is_scalar( $qv['m'] ) ? preg_replace( '|[^0-9]|', '', $qv['m'] ) : '';
1605          $qv['paged'] = absint($qv['paged']);
1606          $qv['cat'] = preg_replace( '|[^0-9,-]|', '', $qv['cat'] ); // comma separated list of positive or negative integers
1607          $qv['author'] = preg_replace( '|[^0-9,-]|', '', $qv['author'] ); // comma separated list of positive or negative integers
1608          $qv['pagename'] = trim( $qv['pagename'] );
1609          $qv['name'] = trim( $qv['name'] );
1610          $qv['title'] = trim( $qv['title'] );
1611          if ( '' !== $qv['hour'] ) $qv['hour'] = absint($qv['hour']);
1612          if ( '' !== $qv['minute'] ) $qv['minute'] = absint($qv['minute']);
1613          if ( '' !== $qv['second'] ) $qv['second'] = absint($qv['second']);
1614          if ( '' !== $qv['menu_order'] ) $qv['menu_order'] = absint($qv['menu_order']);
1615  
1616          // Fairly insane upper bound for search string lengths.
1617          if ( ! is_scalar( $qv['s'] ) || ( ! empty( $qv['s'] ) && strlen( $qv['s'] ) > 1600 ) ) {
1618              $qv['s'] = '';
1619          }
1620  
1621          // Compat. Map subpost to attachment.
1622          if ( '' != $qv['subpost'] )
1623              $qv['attachment'] = $qv['subpost'];
1624          if ( '' != $qv['subpost_id'] )
1625              $qv['attachment_id'] = $qv['subpost_id'];
1626  
1627          $qv['attachment_id'] = absint($qv['attachment_id']);
1628  
1629          if ( ('' != $qv['attachment']) || !empty($qv['attachment_id']) ) {
1630              $this->is_single = true;
1631              $this->is_attachment = true;
1632          } elseif ( '' != $qv['name'] ) {
1633              $this->is_single = true;
1634          } elseif ( $qv['p'] ) {
1635              $this->is_single = true;
1636          } elseif ( ('' !== $qv['hour']) && ('' !== $qv['minute']) &&('' !== $qv['second']) && ('' != $qv['year']) && ('' != $qv['monthnum']) && ('' != $qv['day']) ) {
1637              // If year, month, day, hour, minute, and second are set, a single
1638              // post is being queried.
1639              $this->is_single = true;
1640          } elseif ( '' != $qv['static'] || '' != $qv['pagename'] || !empty($qv['page_id']) ) {
1641              $this->is_page = true;
1642              $this->is_single = false;
1643          } else {
1644              // Look for archive queries. Dates, categories, authors, search, post type archives.
1645  
1646              if ( isset( $this->query['s'] ) ) {
1647                  $this->is_search = true;
1648              }
1649  
1650              if ( '' !== $qv['second'] ) {
1651                  $this->is_time = true;
1652                  $this->is_date = true;
1653              }
1654  
1655              if ( '' !== $qv['minute'] ) {
1656                  $this->is_time = true;
1657                  $this->is_date = true;
1658              }
1659  
1660              if ( '' !== $qv['hour'] ) {
1661                  $this->is_time = true;
1662                  $this->is_date = true;
1663              }
1664  
1665              if ( $qv['day'] ) {
1666                  if ( ! $this->is_date ) {
1667                      $date = sprintf( '%04d-%02d-%02d', $qv['year'], $qv['monthnum'], $qv['day'] );
1668                      if ( $qv['monthnum'] && $qv['year'] && ! wp_checkdate( $qv['monthnum'], $qv['day'], $qv['year'], $date ) ) {
1669                          $qv['error'] = '404';
1670                      } else {
1671                          $this->is_day = true;
1672                          $this->is_date = true;
1673                      }
1674                  }
1675              }
1676  
1677              if ( $qv['monthnum'] ) {
1678                  if ( ! $this->is_date ) {
1679                      if ( 12 < $qv['monthnum'] ) {
1680                          $qv['error'] = '404';
1681                      } else {
1682                          $this->is_month = true;
1683                          $this->is_date = true;
1684                      }
1685                  }
1686              }
1687  
1688              if ( $qv['year'] ) {
1689                  if ( ! $this->is_date ) {
1690                      $this->is_year = true;
1691                      $this->is_date = true;
1692                  }
1693              }
1694  
1695              if ( $qv['m'] ) {
1696                  $this->is_date = true;
1697                  if ( strlen($qv['m']) > 9 ) {
1698                      $this->is_time = true;
1699                  } elseif ( strlen( $qv['m'] ) > 7 ) {
1700                      $this->is_day = true;
1701                  } elseif ( strlen( $qv['m'] ) > 5 ) {
1702                      $this->is_month = true;
1703                  } else {
1704                      $this->is_year = true;
1705                  }
1706              }
1707  
1708              if ( '' != $qv['w'] ) {
1709                  $this->is_date = true;
1710              }
1711  
1712              $this->query_vars_hash = false;
1713              $this->parse_tax_query( $qv );
1714  
1715              foreach ( $this->tax_query->queries as $tax_query ) {
1716                  if ( ! is_array( $tax_query ) ) {
1717                      continue;
1718                  }
1719  
1720                  if ( isset( $tax_query['operator'] ) && 'NOT IN' != $tax_query['operator'] ) {
1721                      switch ( $tax_query['taxonomy'] ) {
1722                          case 'category':
1723                              $this->is_category = true;
1724                              break;
1725                          case 'post_tag':
1726                              $this->is_tag = true;
1727                              break;
1728                          default:
1729                              $this->is_tax = true;
1730                      }
1731                  }
1732              }
1733              unset( $tax_query );
1734  
1735              if ( empty($qv['author']) || ($qv['author'] == '0') ) {
1736                  $this->is_author = false;
1737              } else {
1738                  $this->is_author = true;
1739              }
1740  
1741              if ( '' != $qv['author_name'] )
1742                  $this->is_author = true;
1743  
1744              if ( !empty( $qv['post_type'] ) && ! is_array( $qv['post_type'] ) ) {
1745                  $post_type_obj = get_post_type_object( $qv['post_type'] );
1746                  if ( ! empty( $post_type_obj->has_archive ) )
1747                      $this->is_post_type_archive = true;
1748              }
1749  
1750              if ( $this->is_post_type_archive || $this->is_date || $this->is_author || $this->is_category || $this->is_tag || $this->is_tax )
1751                  $this->is_archive = true;
1752          }
1753  
1754          if ( '' != $qv['feed'] )
1755              $this->is_feed = true;
1756  
1757          if ( '' != $qv['embed'] ) {
1758              $this->is_embed = true;
1759          }
1760  
1761          if ( '' != $qv['tb'] )
1762              $this->is_trackback = true;
1763  
1764          if ( '' != $qv['paged'] && ( intval($qv['paged']) > 1 ) )
1765              $this->is_paged = true;
1766  
1767          // if we're previewing inside the write screen
1768          if ( '' != $qv['preview'] )
1769              $this->is_preview = true;
1770  
1771          if ( is_admin() )
1772              $this->is_admin = true;
1773  
1774          if ( false !== strpos($qv['feed'], 'comments-') ) {
1775              $qv['feed'] = str_replace('comments-', '', $qv['feed']);
1776              $qv['withcomments'] = 1;
1777          }
1778  
1779          $this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;
1780  
1781          if ( $this->is_feed && ( !empty($qv['withcomments']) || ( empty($qv['withoutcomments']) && $this->is_singular ) ) )
1782              $this->is_comment_feed = true;
1783  
1784          if ( !( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_robots ) )
1785              $this->is_home = true;
1786  
1787          // Correct is_* for page_on_front and page_for_posts
1788          if ( $this->is_home && 'page' == get_option('show_on_front') && get_option('page_on_front') ) {
1789              $_query = wp_parse_args($this->query);
1790              // pagename can be set and empty depending on matched rewrite rules. Ignore an empty pagename.
1791              if ( isset($_query['pagename']) && '' == $_query['pagename'] )
1792                  unset($_query['pagename']);
1793  
1794              unset( $_query['embed'] );
1795  
1796              if ( empty($_query) || !array_diff( array_keys($_query), array('preview', 'page', 'paged', 'cpage') ) ) {
1797                  $this->is_page = true;
1798                  $this->is_home = false;
1799                  $qv['page_id'] = get_option('page_on_front');
1800                  // Correct <!--nextpage--> for page_on_front
1801                  if ( !empty($qv['paged']) ) {
1802                      $qv['page'] = $qv['paged'];
1803                      unset($qv['paged']);
1804                  }
1805              }
1806          }
1807  
1808          if ( '' != $qv['pagename'] ) {
1809              $this->queried_object = get_page_by_path( $qv['pagename'] );
1810  
1811              if ( $this->queried_object && 'attachment' == $this->queried_object->post_type ) {
1812                  if ( preg_match( "/^[^%]*%(?:postname)%/", get_option( 'permalink_structure' ) ) ) {
1813                      // See if we also have a post with the same slug
1814                      $post = get_page_by_path( $qv['pagename'], OBJECT, 'post' );
1815                      if ( $post ) {
1816                          $this->queried_object = $post;
1817                          $this->is_page = false;
1818                          $this->is_single = true;
1819                      }
1820                  }
1821              }
1822  
1823              if ( ! empty( $this->queried_object ) ) {
1824                  $this->queried_object_id = (int) $this->queried_object->ID;
1825              } else {
1826                  unset( $this->queried_object );
1827              }
1828  
1829              if  ( 'page' == get_option('show_on_front') && isset($this->queried_object_id) && $this->queried_object_id == get_option('page_for_posts') ) {
1830                  $this->is_page = false;
1831                  $this->is_home = true;
1832                  $this->is_posts_page = true;
1833              }
1834          }
1835  
1836          if ( $qv['page_id'] ) {
1837              if  ( 'page' == get_option('show_on_front') && $qv['page_id'] == get_option('page_for_posts') ) {
1838                  $this->is_page = false;
1839                  $this->is_home = true;
1840                  $this->is_posts_page = true;
1841              }
1842          }
1843  
1844          if ( !empty($qv['post_type']) ) {
1845              if ( is_array($qv['post_type']) )
1846                  $qv['post_type'] = array_map('sanitize_key', $qv['post_type']);
1847              else
1848                  $qv['post_type'] = sanitize_key($qv['post_type']);
1849          }
1850  
1851          if ( ! empty( $qv['post_status'] ) ) {
1852              if ( is_array( $qv['post_status'] ) )
1853                  $qv['post_status'] = array_map('sanitize_key', $qv['post_status']);
1854              else
1855                  $qv['post_status'] = preg_replace('|[^a-z0-9_,-]|', '', $qv['post_status']);
1856          }
1857  
1858          if ( $this->is_posts_page && ( ! isset($qv['withcomments']) || ! $qv['withcomments'] ) )
1859              $this->is_comment_feed = false;
1860  
1861          $this->is_singular = $this->is_single || $this->is_page || $this->is_attachment;
1862          // Done correcting is_* for page_on_front and page_for_posts
1863  
1864          if ( '404' == $qv['error'] )
1865              $this->set_404();
1866  
1867          $this->is_embed = $this->is_embed && ( $this->is_singular || $this->is_404 );
1868  
1869          $this->query_vars_hash = md5( serialize( $this->query_vars ) );
1870          $this->query_vars_changed = false;
1871  
1872          /**
1873           * Fires after the main query vars have been parsed.
1874           *
1875           * @since 1.5.0
1876           *
1877           * @param WP_Query &$this The WP_Query instance (passed by reference).
1878           */
1879          do_action_ref_array( 'parse_query', array( &$this ) );
1880      }
1881  
1882      /**
1883       * Parses various taxonomy related query vars.
1884       *
1885       * For BC, this method is not marked as protected. See [28987].
1886       *
1887       * @access protected
1888       * @since 3.1.0
1889       *
1890       * @param array $q The query variables. Passed by reference.
1891       */
1892  	public function parse_tax_query( &$q ) {
1893          if ( ! empty( $q['tax_query'] ) && is_array( $q['tax_query'] ) ) {
1894              $tax_query = $q['tax_query'];
1895          } else {
1896              $tax_query = array();
1897          }
1898  
1899          if ( !empty($q['taxonomy']) && !empty($q['term']) ) {
1900              $tax_query[] = array(
1901                  'taxonomy' => $q['taxonomy'],
1902                  'terms' => array( $q['term'] ),
1903                  'field' => 'slug',
1904              );
1905          }
1906  
1907          foreach ( get_taxonomies( array() , 'objects' ) as $taxonomy => $t ) {
1908              if ( 'post_tag' == $taxonomy )
1909                  continue;    // Handled further down in the $q['tag'] block
1910  
1911              if ( $t->query_var && !empty( $q[$t->query_var] ) ) {
1912                  $tax_query_defaults = array(
1913                      'taxonomy' => $taxonomy,
1914                      'field' => 'slug',
1915                  );
1916  
1917                   if ( isset( $t->rewrite['hierarchical'] ) && $t->rewrite['hierarchical'] ) {
1918                      $q[$t->query_var] = wp_basename( $q[$t->query_var] );
1919                  }
1920  
1921                  $term = $q[$t->query_var];
1922  
1923                  if ( is_array( $term ) ) {
1924                      $term = implode( ',', $term );
1925                  }
1926  
1927                  if ( strpos($term, '+') !== false ) {
1928                      $terms = preg_split( '/[+]+/', $term );
1929                      foreach ( $terms as $term ) {
1930                          $tax_query[] = array_merge( $tax_query_defaults, array(
1931                              'terms' => array( $term )
1932                          ) );
1933                      }
1934                  } else {
1935                      $tax_query[] = array_merge( $tax_query_defaults, array(
1936                          'terms' => preg_split( '/[,]+/', $term )
1937                      ) );
1938                  }
1939              }
1940          }
1941  
1942          // If querystring 'cat' is an array, implode it.
1943          if ( is_array( $q['cat'] ) ) {
1944              $q['cat'] = implode( ',', $q['cat'] );
1945          }
1946  
1947          // Category stuff
1948          if ( ! empty( $q['cat'] ) && ! $this->is_singular ) {
1949              $cat_in = $cat_not_in = array();
1950  
1951              $cat_array = preg_split( '/[,\s]+/', urldecode( $q['cat'] ) );
1952              $cat_array = array_map( 'intval', $cat_array );
1953              $q['cat'] = implode( ',', $cat_array );
1954  
1955              foreach ( $cat_array as $cat ) {
1956                  if ( $cat > 0 )
1957                      $cat_in[] = $cat;
1958                  elseif ( $cat < 0 )
1959                      $cat_not_in[] = abs( $cat );
1960              }
1961  
1962              if ( ! empty( $cat_in ) ) {
1963                  $tax_query[] = array(
1964                      'taxonomy' => 'category',
1965                      'terms' => $cat_in,
1966                      'field' => 'term_id',
1967                      'include_children' => true
1968                  );
1969              }
1970  
1971              if ( ! empty( $cat_not_in ) ) {
1972                  $tax_query[] = array(
1973                      'taxonomy' => 'category',
1974                      'terms' => $cat_not_in,
1975                      'field' => 'term_id',
1976                      'operator' => 'NOT IN',
1977                      'include_children' => true
1978                  );
1979              }
1980              unset( $cat_array, $cat_in, $cat_not_in );
1981          }
1982  
1983          if ( ! empty( $q['category__and'] ) && 1 === count( (array) $q['category__and'] ) ) {
1984              $q['category__and'] = (array) $q['category__and'];
1985              if ( ! isset( $q['category__in'] ) )
1986                  $q['category__in'] = array();
1987              $q['category__in'][] = absint( reset( $q['category__and'] ) );
1988              unset( $q['category__and'] );
1989          }
1990  
1991          if ( ! empty( $q['category__in'] ) ) {
1992              $q['category__in'] = array_map( 'absint', array_unique( (array) $q['category__in'] ) );
1993              $tax_query[] = array(
1994                  'taxonomy' => 'category',
1995                  'terms' => $q['category__in'],
1996                  'field' => 'term_id',
1997                  'include_children' => false
1998              );
1999          }
2000  
2001          if ( ! empty($q['category__not_in']) ) {
2002              $q['category__not_in'] = array_map( 'absint', array_unique( (array) $q['category__not_in'] ) );
2003              $tax_query[] = array(
2004                  'taxonomy' => 'category',
2005                  'terms' => $q['category__not_in'],
2006                  'operator' => 'NOT IN',
2007                  'include_children' => false
2008              );
2009          }
2010  
2011          if ( ! empty($q['category__and']) ) {
2012              $q['category__and'] = array_map( 'absint', array_unique( (array) $q['category__and'] ) );
2013              $tax_query[] = array(
2014                  'taxonomy' => 'category',
2015                  'terms' => $q['category__and'],
2016                  'field' => 'term_id',
2017                  'operator' => 'AND',
2018                  'include_children' => false
2019              );
2020          }
2021  
2022          // If querystring 'tag' is array, implode it.
2023          if ( is_array( $q['tag'] ) ) {
2024              $q['tag'] = implode( ',', $q['tag'] );
2025          }
2026  
2027          // Tag stuff
2028          if ( '' != $q['tag'] && !$this->is_singular && $this->query_vars_changed ) {
2029              if ( strpos($q['tag'], ',') !== false ) {
2030                  $tags = preg_split('/[,\r\n\t ]+/', $q['tag']);
2031                  foreach ( (array) $tags as $tag ) {
2032                      $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
2033                      $q['tag_slug__in'][] = $tag;
2034                  }
2035              } elseif ( preg_match('/[+\r\n\t ]+/', $q['tag'] ) || ! empty( $q['cat'] ) ) {
2036                  $tags = preg_split('/[+\r\n\t ]+/', $q['tag']);
2037                  foreach ( (array) $tags as $tag ) {
2038                      $tag = sanitize_term_field('slug', $tag, 0, 'post_tag', 'db');
2039                      $q['tag_slug__and'][] = $tag;
2040                  }
2041              } else {
2042                  $q['tag'] = sanitize_term_field('slug', $q['tag'], 0, 'post_tag', 'db');
2043                  $q['tag_slug__in'][] = $q['tag'];
2044              }
2045          }
2046  
2047          if ( !empty($q['tag_id']) ) {
2048              $q['tag_id'] = absint( $q['tag_id'] );
2049              $tax_query[] = array(
2050                  'taxonomy' => 'post_tag',
2051                  'terms' => $q['tag_id']
2052              );
2053          }
2054  
2055          if ( !empty($q['tag__in']) ) {
2056              $q['tag__in'] = array_map('absint', array_unique( (array) $q['tag__in'] ) );
2057              $tax_query[] = array(
2058                  'taxonomy' => 'post_tag',
2059                  'terms' => $q['tag__in']
2060              );
2061          }
2062  
2063          if ( !empty($q['tag__not_in']) ) {
2064              $q['tag__not_in'] = array_map('absint', array_unique( (array) $q['tag__not_in'] ) );
2065              $tax_query[] = array(
2066                  'taxonomy' => 'post_tag',
2067                  'terms' => $q['tag__not_in'],
2068                  'operator' => 'NOT IN'
2069              );
2070          }
2071  
2072          if ( !empty($q['tag__and']) ) {
2073              $q['tag__and'] = array_map('absint', array_unique( (array) $q['tag__and'] ) );
2074              $tax_query[] = array(
2075                  'taxonomy' => 'post_tag',
2076                  'terms' => $q['tag__and'],
2077                  'operator' => 'AND'
2078              );
2079          }
2080  
2081          if ( !empty($q['tag_slug__in']) ) {
2082              $q['tag_slug__in'] = array_map('sanitize_title_for_query', array_unique( (array) $q['tag_slug__in'] ) );
2083              $tax_query[] = array(
2084                  'taxonomy' => 'post_tag',
2085                  'terms' => $q['tag_slug__in'],
2086                  'field' => 'slug'
2087              );
2088          }
2089  
2090          if ( !empty($q['tag_slug__and']) ) {
2091              $q['tag_slug__and'] = array_map('sanitize_title_for_query', array_unique( (array) $q['tag_slug__and'] ) );
2092              $tax_query[] = array(
2093                  'taxonomy' => 'post_tag',
2094                  'terms' => $q['tag_slug__and'],
2095                  'field' => 'slug',
2096                  'operator' => 'AND'
2097              );
2098          }
2099  
2100          $this->tax_query = new WP_Tax_Query( $tax_query );
2101  
2102          /**
2103           * Fires after taxonomy-related query vars have been parsed.
2104           *
2105           * @since 3.7.0
2106           *
2107           * @param WP_Query $this The WP_Query instance.
2108           */
2109          do_action( 'parse_tax_query', $this );
2110      }
2111  
2112      /**
2113       * Generate SQL for the WHERE clause based on passed search terms.
2114       *
2115       * @since 3.7.0
2116       *
2117       * @global wpdb $wpdb WordPress database abstraction object.
2118       *
2119       * @param array $q Query variables.
2120       * @return string WHERE clause.
2121       */
2122  	protected function parse_search( &$q ) {
2123          global $wpdb;
2124  
2125          $search = '';
2126  
2127          // added slashes screw with quote grouping when done early, so done later
2128          $q['s'] = stripslashes( $q['s'] );
2129          if ( empty( $_GET['s'] ) && $this->is_main_query() )
2130              $q['s'] = urldecode( $q['s'] );
2131          // there are no line breaks in <input /> fields
2132          $q['s'] = str_replace( array( "\r", "\n" ), '', $q['s'] );
2133          $q['search_terms_count'] = 1;
2134          if ( ! empty( $q['sentence'] ) ) {
2135              $q['search_terms'] = array( $q['s'] );
2136          } else {
2137              if ( preg_match_all( '/".*?("|$)|((?<=[\t ",+])|^)[^\t ",+]+/', $q['s'], $matches ) ) {
2138                  $q['search_terms_count'] = count( $matches[0] );
2139                  $q['search_terms'] = $this->parse_search_terms( $matches[0] );
2140                  // if the search string has only short terms or stopwords, or is 10+ terms long, match it as sentence
2141                  if ( empty( $q['search_terms'] ) || count( $q['search_terms'] ) > 9 )
2142                      $q['search_terms'] = array( $q['s'] );
2143              } else {
2144                  $q['search_terms'] = array( $q['s'] );
2145              }
2146          }
2147  
2148          $n = ! empty( $q['exact'] ) ? '' : '%';
2149          $searchand = '';
2150          $q['search_orderby_title'] = array();
2151          foreach ( $q['search_terms'] as $term ) {
2152              // Terms prefixed with '-' should be excluded.
2153              $include = '-' !== substr( $term, 0, 1 );
2154              if ( $include ) {
2155                  $like_op  = 'LIKE';
2156                  $andor_op = 'OR';
2157              } else {
2158                  $like_op  = 'NOT LIKE';
2159                  $andor_op = 'AND';
2160                  $term     = substr( $term, 1 );
2161              }
2162  
2163              if ( $n && $include ) {
2164                  $like = '%' . $wpdb->esc_like( $term ) . '%';
2165                  $q['search_orderby_title'][] = $wpdb->prepare( "$wpdb->posts.post_title LIKE %s", $like );
2166              }
2167  
2168              $like = $n . $wpdb->esc_like( $term ) . $n;
2169              $search .= $wpdb->prepare( "{$searchand}(($wpdb->posts.post_title $like_op %s) $andor_op ($wpdb->posts.post_excerpt $like_op %s) $andor_op ($wpdb->posts.post_content $like_op %s))", $like, $like, $like );
2170              $searchand = ' AND ';
2171          }
2172  
2173          if ( ! empty( $search ) ) {
2174              $search = " AND ({$search}) ";
2175              if ( ! is_user_logged_in() )
2176                  $search .= " AND ($wpdb->posts.post_password = '') ";
2177          }
2178  
2179          return $search;
2180      }
2181  
2182      /**
2183       * Check if the terms are suitable for searching.
2184       *
2185       * Uses an array of stopwords (terms) that are excluded from the separate
2186       * term matching when searching for posts. The list of English stopwords is
2187       * the approximate search engines list, and is translatable.
2188       *
2189       * @since 3.7.0
2190       *
2191       * @param array $terms Terms to check.
2192       * @return array Terms that are not stopwords.
2193       */
2194  	protected function parse_search_terms( $terms ) {
2195          $strtolower = function_exists( 'mb_strtolower' ) ? 'mb_strtolower' : 'strtolower';
2196          $checked = array();
2197  
2198          $stopwords = $this->get_search_stopwords();
2199  
2200          foreach ( $terms as $term ) {
2201              // keep before/after spaces when term is for exact match
2202              if ( preg_match( '/^".+"$/', $term ) )
2203                  $term = trim( $term, "\"'" );
2204              else
2205                  $term = trim( $term, "\"' " );
2206  
2207              // Avoid single A-Z and single dashes.
2208              if ( ! $term || ( 1 === strlen( $term ) && preg_match( '/^[a-z\-]$/i', $term ) ) )
2209                  continue;
2210  
2211              if ( in_array( call_user_func( $strtolower, $term ), $stopwords, true ) )
2212                  continue;
2213  
2214              $checked[] = $term;
2215          }
2216  
2217          return $checked;
2218      }
2219  
2220      /**
2221       * Retrieve stopwords used when parsing search terms.
2222       *
2223       * @since 3.7.0
2224       *
2225       * @return array Stopwords.
2226       */
2227  	protected function get_search_stopwords() {
2228          if ( isset( $this->stopwords ) )
2229              return $this->stopwords;
2230  
2231          /* translators: This is a comma-separated list of very common words that should be excluded from a search,
2232           * like a, an, and the. These are usually called "stopwords". You should not simply translate these individual
2233           * words into your language. Instead, look for and provide commonly accepted stopwords in your language.
2234           */
2235          $words = explode( ',', _x( 'about,an,are,as,at,be,by,com,for,from,how,in,is,it,of,on,or,that,the,this,to,was,what,when,where,who,will,with,www',
2236              'Comma-separated list of search stopwords in your language' ) );
2237  
2238          $stopwords = array();
2239          foreach ( $words as $word ) {
2240              $word = trim( $word, "\r\n\t " );
2241              if ( $word )
2242                  $stopwords[] = $word;
2243          }
2244  
2245          /**
2246           * Filters stopwords used when parsing search terms.
2247           *
2248           * @since 3.7.0
2249           *
2250           * @param array $stopwords Stopwords.
2251           */
2252          $this->stopwords = apply_filters( 'wp_search_stopwords', $stopwords );
2253          return $this->stopwords;
2254      }
2255  
2256      /**
2257       * Generate SQL for the ORDER BY condition based on passed search terms.
2258       *
2259       * @global wpdb $wpdb WordPress database abstraction object.
2260       *
2261       * @param array $q Query variables.
2262       * @return string ORDER BY clause.
2263       */
2264  	protected function parse_search_order( &$q ) {
2265          global $wpdb;
2266  
2267          if ( $q['search_terms_count'] > 1 ) {
2268              $num_terms = count( $q['search_orderby_title'] );
2269  
2270              // If the search terms contain negative queries, don't bother ordering by sentence matches.
2271              $like = '';
2272              if ( ! preg_match( '/(?:\s|^)\-/', $q['s'] ) ) {
2273                  $like = '%' . $wpdb->esc_like( $q['s'] ) . '%';
2274              }
2275  
2276              $search_orderby = '';
2277  
2278              // sentence match in 'post_title'
2279              if ( $like ) {
2280                  $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_title LIKE %s THEN 1 ", $like );
2281              }
2282  
2283              // sanity limit, sort as sentence when more than 6 terms
2284              // (few searches are longer than 6 terms and most titles are not)
2285              if ( $num_terms < 7 ) {
2286                  // all words in title
2287                  $search_orderby .= 'WHEN ' . implode( ' AND ', $q['search_orderby_title'] ) . ' THEN 2 ';
2288                  // any word in title, not needed when $num_terms == 1
2289                  if ( $num_terms > 1 )
2290                      $search_orderby .= 'WHEN ' . implode( ' OR ', $q['search_orderby_title'] ) . ' THEN 3 ';
2291              }
2292  
2293              // Sentence match in 'post_content' and 'post_excerpt'.
2294              if ( $like ) {
2295                  $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_excerpt LIKE %s THEN 4 ", $like );
2296                  $search_orderby .= $wpdb->prepare( "WHEN $wpdb->posts.post_content LIKE %s THEN 5 ", $like );
2297              }
2298  
2299              if ( $search_orderby ) {
2300                  $search_orderby = '(CASE ' . $search_orderby . 'ELSE 6 END)';
2301              }
2302          } else {
2303              // single word or sentence search
2304              $search_orderby = reset( $q['search_orderby_title'] ) . ' DESC';
2305          }
2306  
2307          return $search_orderby;
2308      }
2309  
2310      /**
2311       * If the passed orderby value is allowed, convert the alias to a
2312       * properly-prefixed orderby value.
2313       *
2314       * @since 4.0.0
2315       * @access protected
2316       *
2317       * @global wpdb $wpdb WordPress database abstraction object.
2318       *
2319       * @param string $orderby Alias for the field to order by.
2320       * @return string|false Table-prefixed value to used in the ORDER clause. False otherwise.
2321       */
2322  	protected function parse_orderby( $orderby ) {
2323          global $wpdb;
2324  
2325          // Used to filter values.
2326          $allowed_keys = array(
2327              'post_name', 'post_author', 'post_date', 'post_title', 'post_modified',
2328              'post_parent', 'post_type', 'name', 'author', 'date', 'title', 'modified',
2329              'parent', 'type', 'ID', 'menu_order', 'comment_count', 'rand',
2330          );
2331  
2332          $primary_meta_key = '';
2333          $primary_meta_query = false;
2334          $meta_clauses = $this->meta_query->get_clauses();
2335          if ( ! empty( $meta_clauses ) ) {
2336              $primary_meta_query = reset( $meta_clauses );
2337  
2338              if ( ! empty( $primary_meta_query['key'] ) ) {
2339                  $primary_meta_key = $primary_meta_query['key'];
2340                  $allowed_keys[] = $primary_meta_key;
2341              }
2342  
2343              $allowed_keys[] = 'meta_value';
2344              $allowed_keys[] = 'meta_value_num';
2345              $allowed_keys   = array_merge( $allowed_keys, array_keys( $meta_clauses ) );
2346          }
2347  
2348          // If RAND() contains a seed value, sanitize and add to allowed keys.
2349          $rand_with_seed = false;
2350          if ( preg_match( '/RAND\(([0-9]+)\)/i', $orderby, $matches ) ) {
2351              $orderby = sprintf( 'RAND(%s)', intval( $matches[1] ) );
2352              $allowed_keys[] = $orderby;
2353              $rand_with_seed = true;
2354          }
2355  
2356          if ( ! in_array( $orderby, $allowed_keys, true ) ) {
2357              return false;
2358          }
2359  
2360          switch ( $orderby ) {
2361              case 'post_name':
2362              case 'post_author':
2363              case 'post_date':
2364              case 'post_title':
2365              case 'post_modified':
2366              case 'post_parent':
2367              case 'post_type':
2368              case 'ID':
2369              case 'menu_order':
2370              case 'comment_count':
2371                  $orderby_clause = "$wpdb->posts.{$orderby}";
2372                  break;
2373              case 'rand':
2374                  $orderby_clause = 'RAND()';
2375                  break;
2376              case $primary_meta_key:
2377              case 'meta_value':
2378                  if ( ! empty( $primary_meta_query['type'] ) ) {
2379                      $orderby_clause = "CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})";
2380                  } else {
2381                      $orderby_clause = "{$primary_meta_query['alias']}.meta_value";
2382                  }
2383                  break;
2384              case 'meta_value_num':
2385                  $orderby_clause = "{$primary_meta_query['alias']}.meta_value+0";
2386                  break;
2387              default:
2388                  if ( array_key_exists( $orderby, $meta_clauses ) ) {
2389                      // $orderby corresponds to a meta_query clause.
2390                      $meta_clause = $meta_clauses[ $orderby ];
2391                      $orderby_clause = "CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})";
2392                  } elseif ( $rand_with_seed ) {
2393                      $orderby_clause = $orderby;
2394                  } else {
2395                      // Default: order by post field.
2396                      $orderby_clause = "$wpdb->posts.post_" . sanitize_key( $orderby );
2397                  }
2398  
2399                  break;
2400          }
2401  
2402          return $orderby_clause;
2403      }
2404  
2405      /**
2406       * Parse an 'order' query variable and cast it to ASC or DESC as necessary.
2407       *
2408       * @since 4.0.0
2409       * @access protected
2410       *
2411       * @param string $order The 'order' query variable.
2412       * @return string The sanitized 'order' query variable.
2413       */
2414  	protected function parse_order( $order ) {
2415          if ( ! is_string( $order ) || empty( $order ) ) {
2416              return 'DESC';
2417          }
2418  
2419          if ( 'ASC' === strtoupper( $order ) ) {
2420              return 'ASC';
2421          } else {
2422              return 'DESC';
2423          }
2424      }
2425  
2426      /**
2427       * Sets the 404 property and saves whether query is feed.
2428       *
2429       * @since 2.0.0
2430       * @access public
2431       */
2432  	public function set_404() {
2433          $is_feed = $this->is_feed;
2434  
2435          $this->init_query_flags();
2436          $this->is_404 = true;
2437  
2438          $this->is_feed = $is_feed;
2439      }
2440  
2441      /**
2442       * Retrieve query variable.
2443       *
2444       * @since 1.5.0
2445       * @since 3.9.0 The `$default` argument was introduced.
2446       *
2447       * @access public
2448       *
2449       * @param string $query_var Query variable key.
2450       * @param mixed  $default   Optional. Value to return if the query variable is not set. Default empty.
2451       * @return mixed Contents of the query variable.
2452       */
2453  	public function get( $query_var, $default = '' ) {
2454          if ( isset( $this->query_vars[ $query_var ] ) ) {
2455              return $this->query_vars[ $query_var ];
2456          }
2457  
2458          return $default;
2459      }
2460  
2461      /**
2462       * Set query variable.
2463       *
2464       * @since 1.5.0
2465       * @access public
2466       *
2467       * @param string $query_var Query variable key.
2468       * @param mixed  $value     Query variable value.
2469       */
2470  	public function set($query_var, $value) {
2471          $this->query_vars[$query_var] = $value;
2472      }
2473  
2474      /**
2475       * Retrieve the posts based on query variables.
2476       *
2477       * There are a few filters and actions that can be used to modify the post
2478       * database query.
2479       *
2480       * @since 1.5.0
2481       * @access public
2482       *
2483       * @global wpdb $wpdb WordPress database abstraction object.
2484       *
2485       * @return array List of posts.
2486       */
2487  	public function get_posts() {
2488          global $wpdb;
2489  
2490          $this->parse_query();
2491  
2492          /**
2493           * Fires after the query variable object is created, but before the actual query is run.
2494           *
2495           * Note: If using conditional tags, use the method versions within the passed instance
2496           * (e.g. $this->is_main_query() instead of is_main_query()). This is because the functions
2497           * like is_main_query() test against the global $wp_query instance, not the passed one.
2498           *
2499           * @since 2.0.0
2500           *
2501           * @param WP_Query &$this The WP_Query instance (passed by reference).
2502           */
2503          do_action_ref_array( 'pre_get_posts', array( &$this ) );
2504  
2505          // Shorthand.
2506          $q = &$this->query_vars;
2507  
2508          // Fill again in case pre_get_posts unset some vars.
2509          $q = $this->fill_query_vars($q);
2510  
2511          // Parse meta query
2512          $this->meta_query = new WP_Meta_Query();
2513          $this->meta_query->parse_query_vars( $q );
2514  
2515          // Set a flag if a pre_get_posts hook changed the query vars.
2516          $hash = md5( serialize( $this->query_vars ) );
2517          if ( $hash != $this->query_vars_hash ) {
2518              $this->query_vars_changed = true;
2519              $this->query_vars_hash = $hash;
2520          }
2521          unset($hash);
2522  
2523          // First let's clear some variables
2524          $distinct = '';
2525          $whichauthor = '';
2526          $whichmimetype = '';
2527          $where = '';
2528          $limits = '';
2529          $join = '';
2530          $search = '';
2531          $groupby = '';
2532          $post_status_join = false;
2533          $page = 1;
2534  
2535          if ( isset( $q['caller_get_posts'] ) ) {
2536              _deprecated_argument( 'WP_Query', '3.1.0', __( '"caller_get_posts" is deprecated. Use "ignore_sticky_posts" instead.' ) );
2537              if ( !isset( $q['ignore_sticky_posts'] ) )
2538                  $q['ignore_sticky_posts'] = $q['caller_get_posts'];
2539          }
2540  
2541          if ( !isset( $q['ignore_sticky_posts'] ) )
2542              $q['ignore_sticky_posts'] = false;
2543  
2544          if ( !isset($q['suppress_filters']) )
2545              $q['suppress_filters'] = false;
2546  
2547          if ( !isset($q['cache_results']) ) {
2548              if ( wp_using_ext_object_cache() )
2549                  $q['cache_results'] = false;
2550              else
2551                  $q['cache_results'] = true;
2552          }
2553  
2554          if ( !isset($q['update_post_term_cache']) )
2555              $q['update_post_term_cache'] = true;
2556  
2557          if ( ! isset( $q['lazy_load_term_meta'] ) ) {
2558              $q['lazy_load_term_meta'] = $q['update_post_term_cache'];
2559          }
2560  
2561          if ( !isset($q['update_post_meta_cache']) )
2562              $q['update_post_meta_cache'] = true;
2563  
2564          if ( !isset($q['post_type']) ) {
2565              if ( $this->is_search )
2566                  $q['post_type'] = 'any';
2567              else
2568                  $q['post_type'] = '';
2569          }
2570          $post_type = $q['post_type'];
2571          if ( empty( $q['posts_per_page'] ) ) {
2572              $q['posts_per_page'] = get_option( 'posts_per_page' );
2573          }
2574          if ( isset($q['showposts']) && $q['showposts'] ) {
2575              $q['showposts'] = (int) $q['showposts'];
2576              $q['posts_per_page'] = $q['showposts'];
2577          }
2578          if ( (isset($q['posts_per_archive_page']) && $q['posts_per_archive_page'] != 0) && ($this->is_archive || $this->is_search) )
2579              $q['posts_per_page'] = $q['posts_per_archive_page'];
2580          if ( !isset($q['nopaging']) ) {
2581              if ( $q['posts_per_page'] == -1 ) {
2582                  $q['nopaging'] = true;
2583              } else {
2584                  $q['nopaging'] = false;
2585              }
2586          }
2587  
2588          if ( $this->is_feed ) {
2589              // This overrides posts_per_page.
2590              if ( ! empty( $q['posts_per_rss'] ) ) {
2591                  $q['posts_per_page'] = $q['posts_per_rss'];
2592              } else {
2593                  $q['posts_per_page'] = get_option( 'posts_per_rss' );
2594              }
2595              $q['nopaging'] = false;
2596          }
2597          $q['posts_per_page'] = (int) $q['posts_per_page'];
2598          if ( $q['posts_per_page'] < -1 )
2599              $q['posts_per_page'] = abs($q['posts_per_page']);
2600          elseif ( $q['posts_per_page'] == 0 )
2601              $q['posts_per_page'] = 1;
2602  
2603          if ( !isset($q['comments_per_page']) || $q['comments_per_page'] == 0 )
2604              $q['comments_per_page'] = get_option('comments_per_page');
2605  
2606          if ( $this->is_home && (empty($this->query) || $q['preview'] == 'true') && ( 'page' == get_option('show_on_front') ) && get_option('page_on_front') ) {
2607              $this->is_page = true;
2608              $this->is_home = false;
2609              $q['page_id'] = get_option('page_on_front');
2610          }
2611  
2612          if ( isset($q['page']) ) {
2613              $q['page'] = trim($q['page'], '/');
2614              $q['page'] = absint($q['page']);
2615          }
2616  
2617          // If true, forcibly turns off SQL_CALC_FOUND_ROWS even when limits are present.
2618          if ( isset($q['no_found_rows']) )
2619              $q['no_found_rows'] = (bool) $q['no_found_rows'];
2620          else
2621              $q['no_found_rows'] = false;
2622  
2623          switch ( $q['fields'] ) {
2624              case 'ids':
2625                  $fields = "$wpdb->posts.ID";
2626                  break;
2627              case 'id=>parent':
2628                  $fields = "$wpdb->posts.ID, $wpdb->posts.post_parent";
2629                  break;
2630              default:
2631                  $fields = "$wpdb->posts.*";
2632          }
2633  
2634          if ( '' !== $q['menu_order'] )
2635              $where .= " AND $wpdb->posts.menu_order = " . $q['menu_order'];
2636  
2637          // The "m" parameter is meant for months but accepts datetimes of varying specificity
2638          if ( $q['m'] ) {
2639              $where .= " AND YEAR($wpdb->posts.post_date)=" . substr($q['m'], 0, 4);
2640              if ( strlen($q['m']) > 5 )
2641                  $where .= " AND MONTH($wpdb->posts.post_date)=" . substr($q['m'], 4, 2);
2642              if ( strlen($q['m']) > 7 )
2643                  $where .= " AND DAYOFMONTH($wpdb->posts.post_date)=" . substr($q['m'], 6, 2);
2644              if ( strlen($q['m']) > 9 )
2645                  $where .= " AND HOUR($wpdb->posts.post_date)=" . substr($q['m'], 8, 2);
2646              if ( strlen($q['m']) > 11 )
2647                  $where .= " AND MINUTE($wpdb->posts.post_date)=" . substr($q['m'], 10, 2);
2648              if ( strlen($q['m']) > 13 )
2649                  $where .= " AND SECOND($wpdb->posts.post_date)=" . substr($q['m'], 12, 2);
2650          }
2651  
2652          // Handle the other individual date parameters
2653          $date_parameters = array();
2654  
2655          if ( '' !== $q['hour'] )
2656              $date_parameters['hour'] = $q['hour'];
2657  
2658          if ( '' !== $q['minute'] )
2659              $date_parameters['minute'] = $q['minute'];
2660  
2661          if ( '' !== $q['second'] )
2662              $date_parameters['second'] = $q['second'];
2663  
2664          if ( $q['year'] )
2665              $date_parameters['year'] = $q['year'];
2666  
2667          if ( $q['monthnum'] )
2668              $date_parameters['monthnum'] = $q['monthnum'];
2669  
2670          if ( $q['w'] )
2671              $date_parameters['week'] = $q['w'];
2672  
2673          if ( $q['day'] )
2674              $date_parameters['day'] = $q['day'];
2675  
2676          if ( $date_parameters ) {
2677              $date_query = new WP_Date_Query( array( $date_parameters ) );
2678              $where .= $date_query->get_sql();
2679          }
2680          unset( $date_parameters, $date_query );
2681  
2682          // Handle complex date queries
2683          if ( ! empty( $q['date_query'] ) ) {
2684              $this->date_query = new WP_Date_Query( $q['date_query'] );
2685              $where .= $this->date_query->get_sql();
2686          }
2687  
2688  
2689          // If we've got a post_type AND it's not "any" post_type.
2690          if ( !empty($q['post_type']) && 'any' != $q['post_type'] ) {
2691              foreach ( (array)$q['post_type'] as $_post_type ) {
2692                  $ptype_obj = get_post_type_object($_post_type);
2693                  if ( !$ptype_obj || !$ptype_obj->query_var || empty($q[ $ptype_obj->query_var ]) )
2694                      continue;
2695  
2696                  if ( ! $ptype_obj->hierarchical ) {
2697                      // Non-hierarchical post types can directly use 'name'.
2698                      $q['name'] = $q[ $ptype_obj->query_var ];
2699                  } else {
2700                      // Hierarchical post types will operate through 'pagename'.
2701                      $q['pagename'] = $q[ $ptype_obj->query_var ];
2702                      $q['name'] = '';
2703                  }
2704  
2705                  // Only one request for a slug is possible, this is why name & pagename are overwritten above.
2706                  break;
2707              } //end foreach
2708              unset($ptype_obj);
2709          }
2710  
2711          if ( '' !== $q['title'] ) {
2712              $where .= $wpdb->prepare( " AND $wpdb->posts.post_title = %s", stripslashes( $q['title'] ) );
2713          }
2714  
2715          // Parameters related to 'post_name'.
2716          if ( '' != $q['name'] ) {
2717              $q['name'] = sanitize_title_for_query( $q['name'] );
2718              $where .= " AND $wpdb->posts.post_name = '" . $q['name'] . "'";
2719          } elseif ( '' != $q['pagename'] ) {
2720              if ( isset($this->queried_object_id) ) {
2721                  $reqpage = $this->queried_object_id;
2722              } else {
2723                  if ( 'page' != $q['post_type'] ) {
2724                      foreach ( (array)$q['post_type'] as $_post_type ) {
2725                          $ptype_obj = get_post_type_object($_post_type);
2726                          if ( !$ptype_obj || !$ptype_obj->hierarchical )
2727                              continue;
2728  
2729                          $reqpage = get_page_by_path($q['pagename'], OBJECT, $_post_type);
2730                          if ( $reqpage )
2731                              break;
2732                      }
2733                      unset($ptype_obj);
2734                  } else {
2735                      $reqpage = get_page_by_path($q['pagename']);
2736                  }
2737                  if ( !empty($reqpage) )
2738                      $reqpage = $reqpage->ID;
2739                  else
2740                      $reqpage = 0;
2741              }
2742  
2743              $page_for_posts = get_option('page_for_posts');
2744              if  ( ('page' != get_option('show_on_front') ) || empty($page_for_posts) || ( $reqpage != $page_for_posts ) ) {
2745                  $q['pagename'] = sanitize_title_for_query( wp_basename( $q['pagename'] ) );
2746                  $q['name'] = $q['pagename'];
2747                  $where .= " AND ($wpdb->posts.ID = '$reqpage')";
2748                  $reqpage_obj = get_post( $reqpage );
2749                  if ( is_object($reqpage_obj) && 'attachment' == $reqpage_obj->post_type ) {
2750                      $this->is_attachment = true;
2751                      $post_type = $q['post_type'] = 'attachment';
2752                      $this->is_page = true;
2753                      $q['attachment_id'] = $reqpage;
2754                  }
2755              }
2756          } elseif ( '' != $q['attachment'] ) {
2757              $q['attachment'] = sanitize_title_for_query( wp_basename( $q['attachment'] ) );
2758              $q['name'] = $q['attachment'];
2759              $where .= " AND $wpdb->posts.post_name = '" . $q['attachment'] . "'";
2760          } elseif ( is_array( $q['post_name__in'] ) && ! empty( $q['post_name__in'] ) ) {
2761              $q['post_name__in'] = array_map( 'sanitize_title_for_query', $q['post_name__in'] );
2762              $post_name__in = "'" . implode( "','", $q['post_name__in'] ) . "'";
2763              $where .= " AND $wpdb->posts.post_name IN ($post_name__in)";
2764          }
2765  
2766          // If an attachment is requested by number, let it supersede any post number.
2767          if ( $q['attachment_id'] )
2768              $q['p'] = absint($q['attachment_id']);
2769  
2770          // If a post number is specified, load that post
2771          if ( $q['p'] ) {
2772              $where .= " AND {$wpdb->posts}.ID = " . $q['p'];
2773          } elseif ( $q['post__in'] ) {
2774              $post__in = implode(',', array_map( 'absint', $q['post__in'] ));
2775              $where .= " AND {$wpdb->posts}.ID IN ($post__in)";
2776          } elseif ( $q['post__not_in'] ) {
2777              $post__not_in = implode(',',  array_map( 'absint', $q['post__not_in'] ));
2778              $where .= " AND {$wpdb->posts}.ID NOT IN ($post__not_in)";
2779          }
2780  
2781          if ( is_numeric( $q['post_parent'] ) ) {
2782              $where .= $wpdb->prepare( " AND $wpdb->posts.post_parent = %d ", $q['post_parent'] );
2783          } elseif ( $q['post_parent__in'] ) {
2784              $post_parent__in = implode( ',', array_map( 'absint', $q['post_parent__in'] ) );
2785              $where .= " AND {$wpdb->posts}.post_parent IN ($post_parent__in)";
2786          } elseif ( $q['post_parent__not_in'] ) {
2787              $post_parent__not_in = implode( ',',  array_map( 'absint', $q['post_parent__not_in'] ) );
2788              $where .= " AND {$wpdb->posts}.post_parent NOT IN ($post_parent__not_in)";
2789          }
2790  
2791          if ( $q['page_id'] ) {
2792              if  ( ('page' != get_option('show_on_front') ) || ( $q['page_id'] != get_option('page_for_posts') ) ) {
2793                  $q['p'] = $q['page_id'];
2794                  $where = " AND {$wpdb->posts}.ID = " . $q['page_id'];
2795              }
2796          }
2797  
2798          // If a search pattern is specified, load the posts that match.
2799          if ( strlen( $q['s'] ) ) {
2800              $search = $this->parse_search( $q );
2801          }
2802  
2803          if ( ! $q['suppress_filters'] ) {
2804              /**
2805               * Filters the search SQL that is used in the WHERE clause of WP_Query.
2806               *
2807               * @since 3.0.0
2808               *
2809               * @param string   $search Search SQL for WHERE clause.
2810               * @param WP_Query $this   The current WP_Query object.
2811               */
2812              $search = apply_filters_ref_array( 'posts_search', array( $search, &$this ) );
2813          }
2814  
2815          // Taxonomies
2816          if ( !$this->is_singular ) {
2817              $this->parse_tax_query( $q );
2818  
2819              $clauses = $this->tax_query->get_sql( $wpdb->posts, 'ID' );
2820  
2821              $join .= $clauses['join'];
2822              $where .= $clauses['where'];
2823          }
2824  
2825          if ( $this->is_tax ) {
2826              if ( empty($post_type) ) {
2827                  // Do a fully inclusive search for currently registered post types of queried taxonomies
2828                  $post_type = array();
2829                  $taxonomies = array_keys( $this->tax_query->queried_terms );
2830                  foreach ( get_post_types( array( 'exclude_from_search' => false ) ) as $pt ) {
2831                      $object_taxonomies = $pt === 'attachment' ? get_taxonomies_for_attachments() : get_object_taxonomies( $pt );
2832                      if ( array_intersect( $taxonomies, $object_taxonomies ) )
2833                          $post_type[] = $pt;
2834                  }
2835                  if ( ! $post_type )
2836                      $post_type = 'any';
2837                  elseif ( count( $post_type ) == 1 )
2838                      $post_type = $post_type[0];
2839  
2840                  $post_status_join = true;
2841              } elseif ( in_array('attachment', (array) $post_type) ) {
2842                  $post_status_join = true;
2843              }
2844          }
2845  
2846          /*
2847           * Ensure that 'taxonomy', 'term', 'term_id', 'cat', and
2848           * 'category_name' vars are set for backward compatibility.
2849           */
2850          if ( ! empty( $this->tax_query->queried_terms ) ) {
2851  
2852              /*
2853               * Set 'taxonomy', 'term', and 'term_id' to the
2854               * first taxonomy other than 'post_tag' or 'category'.
2855               */
2856              if ( ! isset( $q['taxonomy'] ) ) {
2857                  foreach ( $this->tax_query->queried_terms as $queried_taxonomy => $queried_items ) {
2858                      if ( empty( $queried_items['terms'][0] ) ) {
2859                          continue;
2860                      }
2861  
2862                      if ( ! in_array( $queried_taxonomy, array( 'category', 'post_tag' ) ) ) {
2863                          $q['taxonomy'] = $queried_taxonomy;
2864  
2865                          if ( 'slug' === $queried_items['field'] ) {
2866                              $q['term'] = $queried_items['terms'][0];
2867                          } else {
2868                              $q['term_id'] = $queried_items['terms'][0];
2869                          }
2870  
2871                          // Take the first one we find.
2872                          break;
2873                      }
2874                  }
2875              }
2876  
2877              // 'cat', 'category_name', 'tag_id'
2878              foreach ( $this->tax_query->queried_terms as $queried_taxonomy => $queried_items ) {
2879                  if ( empty( $queried_items['terms'][0] ) ) {
2880                      continue;
2881                  }
2882  
2883                  if ( 'category' === $queried_taxonomy ) {
2884                      $the_cat = get_term_by( $queried_items['field'], $queried_items['terms'][0], 'category' );
2885                      if ( $the_cat ) {
2886                          $this->set( 'cat', $the_cat->term_id );
2887                          $this->set( 'category_name', $the_cat->slug );
2888                      }
2889                      unset( $the_cat );
2890                  }
2891  
2892                  if ( 'post_tag' === $queried_taxonomy ) {
2893                      $the_tag = get_term_by( $queried_items['field'], $queried_items['terms'][0], 'post_tag' );
2894                      if ( $the_tag ) {
2895                          $this->set( 'tag_id', $the_tag->term_id );
2896                      }
2897                      unset( $the_tag );
2898                  }
2899              }
2900          }
2901  
2902          if ( !empty( $this->tax_query->queries ) || !empty( $this->meta_query->queries ) ) {
2903              $groupby = "{$wpdb->posts}.ID";
2904          }
2905  
2906          // Author/user stuff
2907  
2908          if ( ! empty( $q['author'] ) && $q['author'] != '0' ) {
2909              $q['author'] = addslashes_gpc( '' . urldecode( $q['author'] ) );
2910              $authors = array_unique( array_map( 'intval', preg_split( '/[,\s]+/', $q['author'] ) ) );
2911              foreach ( $authors as $author ) {
2912                  $key = $author > 0 ? 'author__in' : 'author__not_in';
2913                  $q[$key][] = abs( $author );
2914              }
2915              $q['author'] = implode( ',', $authors );
2916          }
2917  
2918          if ( ! empty( $q['author__not_in'] ) ) {
2919              $author__not_in = implode( ',', array_map( 'absint', array_unique( (array) $q['author__not_in'] ) ) );
2920              $where .= " AND {$wpdb->posts}.post_author NOT IN ($author__not_in) ";
2921          } elseif ( ! empty( $q['author__in'] ) ) {
2922              $author__in = implode( ',', array_map( 'absint', array_unique( (array) $q['author__in'] ) ) );
2923              $where .= " AND {$wpdb->posts}.post_author IN ($author__in) ";
2924          }
2925  
2926          // Author stuff for nice URLs
2927  
2928          if ( '' != $q['author_name'] ) {
2929              if ( strpos($q['author_name'], '/') !== false ) {
2930                  $q['author_name'] = explode('/', $q['author_name']);
2931                  if ( $q['author_name'][ count($q['author_name'])-1 ] ) {
2932                      $q['author_name'] = $q['author_name'][count($q['author_name'])-1]; // no trailing slash
2933                  } else {
2934                      $q['author_name'] = $q['author_name'][count($q['author_name'])-2]; // there was a trailing slash
2935                  }
2936              }
2937              $q['author_name'] = sanitize_title_for_query( $q['author_name'] );
2938              $q['author'] = get_user_by('slug', $q['author_name']);
2939              if ( $q['author'] )
2940                  $q['author'] = $q['author']->ID;
2941              $whichauthor .= " AND ($wpdb->posts.post_author = " . absint($q['author']) . ')';
2942          }
2943  
2944          // MIME-Type stuff for attachment browsing
2945  
2946          if ( isset( $q['post_mime_type'] ) && '' != $q['post_mime_type'] )
2947              $whichmimetype = wp_post_mime_type_where( $q['post_mime_type'], $wpdb->posts );
2948  
2949          $where .= $search . $whichauthor . $whichmimetype;
2950  
2951          if ( ! empty( $this->meta_query->queries ) ) {
2952              $clauses = $this->meta_query->get_sql( 'post', $wpdb->posts, 'ID', $this );
2953              $join   .= $clauses['join'];
2954              $where  .= $clauses['where'];
2955          }
2956  
2957          $rand = ( isset( $q['orderby'] ) && 'rand' === $q['orderby'] );
2958          if ( ! isset( $q['order'] ) ) {
2959              $q['order'] = $rand ? '' : 'DESC';
2960          } else {
2961              $q['order'] = $rand ? '' : $this->parse_order( $q['order'] );
2962          }
2963  
2964          // Order by.
2965          if ( empty( $q['orderby'] ) ) {
2966              /*
2967               * Boolean false or empty array blanks out ORDER BY,
2968               * while leaving the value unset or otherwise empty sets the default.
2969               */
2970              if ( isset( $q['orderby'] ) && ( is_array( $q['orderby'] ) || false === $q['orderby'] ) ) {
2971                  $orderby = '';
2972              } else {
2973                  $orderby = "$wpdb->posts.post_date " . $q['order'];
2974              }
2975          } elseif ( 'none' == $q['orderby'] ) {
2976              $orderby = '';
2977          } elseif ( $q['orderby'] == 'post__in' && ! empty( $post__in ) ) {
2978              $orderby = "FIELD( {$wpdb->posts}.ID, $post__in )";
2979          } elseif ( $q['orderby'] == 'post_parent__in' && ! empty( $post_parent__in ) ) {
2980              $orderby = "FIELD( {$wpdb->posts}.post_parent, $post_parent__in )";
2981          } elseif ( $q['orderby'] == 'post_name__in' && ! empty( $post_name__in ) ) {
2982              $orderby = "FIELD( {$wpdb->posts}.post_name, $post_name__in )";
2983          } else {
2984              $orderby_array = array();
2985              if ( is_array( $q['orderby'] ) ) {
2986                  foreach ( $q['orderby'] as $_orderby => $order ) {
2987                      $orderby = addslashes_gpc( urldecode( $_orderby ) );
2988                      $parsed  = $this->parse_orderby( $orderby );
2989  
2990                      if ( ! $parsed ) {
2991                          continue;
2992                      }
2993  
2994                      $orderby_array[] = $parsed . ' ' . $this->parse_order( $order );
2995                  }
2996                  $orderby = implode( ', ', $orderby_array );
2997  
2998              } else {
2999                  $q['orderby'] = urldecode( $q['orderby'] );
3000                  $q['orderby'] = addslashes_gpc( $q['orderby'] );
3001  
3002                  foreach ( explode( ' ', $q['orderby'] ) as $i => $orderby ) {
3003                      $parsed = $this->parse_orderby( $orderby );
3004                      // Only allow certain values for safety.
3005                      if ( ! $parsed ) {
3006                          continue;
3007                      }
3008  
3009                      $orderby_array[] = $parsed;
3010                  }
3011                  $orderby = implode( ' ' . $q['order'] . ', ', $orderby_array );
3012  
3013                  if ( empty( $orderby ) ) {
3014                      $orderby = "$wpdb->posts.post_date " . $q['order'];
3015                  } elseif ( ! empty( $q['order'] ) ) {
3016                      $orderby .= " {$q['order']}";
3017                  }
3018              }
3019          }
3020  
3021          // Order search results by relevance only when another "orderby" is not specified in the query.
3022          if ( ! empty( $q['s'] ) ) {
3023              $search_orderby = '';
3024              if ( ! empty( $q['search_orderby_title'] ) && ( empty( $q['orderby'] ) && ! $this->is_feed ) || ( isset( $q['orderby'] ) && 'relevance' === $q['orderby'] ) )
3025                  $search_orderby = $this->parse_search_order( $q );
3026  
3027              if ( ! $q['suppress_filters'] ) {
3028                  /**
3029                   * Filters the ORDER BY used when ordering search results.
3030                   *
3031                   * @since 3.7.0
3032                   *
3033                   * @param string   $search_orderby The ORDER BY clause.
3034                   * @param WP_Query $this           The current WP_Query instance.
3035                   */
3036                  $search_orderby = apply_filters( 'posts_search_orderby', $search_orderby, $this );
3037              }
3038  
3039              if ( $search_orderby )
3040                  $orderby = $orderby ? $search_orderby . ', ' . $orderby : $search_orderby;
3041          }
3042  
3043          if ( is_array( $post_type ) && count( $post_type ) > 1 ) {
3044              $post_type_cap = 'multiple_post_type';
3045          } else {
3046              if ( is_array( $post_type ) )
3047                  $post_type = reset( $post_type );
3048              $post_type_object = get_post_type_object( $post_type );
3049              if ( empty( $post_type_object ) )
3050                  $post_type_cap = $post_type;
3051          }
3052  
3053          if ( isset( $q['post_password'] ) ) {
3054              $where .= $wpdb->prepare( " AND $wpdb->posts.post_password = %s", $q['post_password'] );
3055              if ( empty( $q['perm'] ) ) {
3056                  $q['perm'] = 'readable';
3057              }
3058          } elseif ( isset( $q['has_password'] ) ) {
3059              $where .= sprintf( " AND $wpdb->posts.post_password %s ''", $q['has_password'] ? '!=' : '=' );
3060          }
3061  
3062          if ( ! empty( $q['comment_status'] ) ) {
3063              $where .= $wpdb->prepare( " AND $wpdb->posts.comment_status = %s ", $q['comment_status'] );
3064          }
3065  
3066          if ( ! empty( $q['ping_status'] ) )  {
3067              $where .= $wpdb->prepare( " AND $wpdb->posts.ping_status = %s ", $q['ping_status'] );
3068          }
3069  
3070          if ( 'any' == $post_type ) {
3071              $in_search_post_types = get_post_types( array('exclude_from_search' => false) );
3072              if ( empty( $in_search_post_types ) )
3073                  $where .= ' AND 1=0 ';
3074              else
3075                  $where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $in_search_post_types ) . "')";
3076          } elseif ( !empty( $post_type ) && is_array( $post_type ) ) {
3077              $where .= " AND $wpdb->posts.post_type IN ('" . join("', '", $post_type) . "')";
3078          } elseif ( ! empty( $post_type ) ) {
3079              $where .= " AND $wpdb->posts.post_type = '$post_type'";
3080              $post_type_object = get_post_type_object ( $post_type );
3081          } elseif ( $this->is_attachment ) {
3082              $where .= " AND $wpdb->posts.post_type = 'attachment'";
3083              $post_type_object = get_post_type_object ( 'attachment' );
3084          } elseif ( $this->is_page ) {
3085              $where .= " AND $wpdb->posts.post_type = 'page'";
3086              $post_type_object = get_post_type_object ( 'page' );
3087          } else {
3088              $where .= " AND $wpdb->posts.post_type = 'post'";
3089              $post_type_object = get_post_type_object ( 'post' );
3090          }
3091  
3092          $edit_cap = 'edit_post';
3093          $read_cap = 'read_post';
3094  
3095          if ( ! empty( $post_type_object ) ) {
3096              $edit_others_cap = $post_type_object->cap->edit_others_posts;
3097              $read_private_cap = $post_type_object->cap->read_private_posts;
3098          } else {
3099              $edit_others_cap = 'edit_others_' . $post_type_cap . 's';
3100              $read_private_cap = 'read_private_' . $post_type_cap . 's';
3101          }
3102  
3103          $user_id = get_current_user_id();
3104  
3105          $q_status = array();
3106          if ( ! empty( $q['post_status'] ) ) {
3107              $statuswheres = array();
3108              $q_status = $q['post_status'];
3109              if ( ! is_array( $q_status ) )
3110                  $q_status = explode(',', $q_status);
3111              $r_status = array();
3112              $p_status = array();
3113              $e_status = array();
3114              if ( in_array( 'any', $q_status ) ) {
3115                  foreach ( get_post_stati( array( 'exclude_from_search' => true ) ) as $status ) {
3116                      if ( ! in_array( $status, $q_status ) ) {
3117                          $e_status[] = "$wpdb->posts.post_status <> '$status'";
3118                      }
3119                  }
3120              } else {
3121                  foreach ( get_post_stati() as $status ) {
3122                      if ( in_array( $status, $q_status ) ) {
3123                          if ( 'private' == $status )
3124                              $p_status[] = "$wpdb->posts.post_status = '$status'";
3125                          else
3126                              $r_status[] = "$wpdb->posts.post_status = '$status'";
3127                      }
3128                  }
3129              }
3130  
3131              if ( empty($q['perm'] ) || 'readable' != $q['perm'] ) {
3132                  $r_status = array_merge($r_status, $p_status);
3133                  unset($p_status);
3134              }
3135  
3136              if ( !empty($e_status) ) {
3137                  $statuswheres[] = "(" . join( ' AND ', $e_status ) . ")";
3138              }
3139              if ( !empty($r_status) ) {
3140                  if ( !empty($q['perm'] ) && 'editable' == $q['perm'] && !current_user_can($edit_others_cap) )
3141                      $statuswheres[] = "($wpdb->posts.post_author = $user_id " . "AND (" . join( ' OR ', $r_status ) . "))";
3142                  else
3143                      $statuswheres[] = "(" . join( ' OR ', $r_status ) . ")";
3144              }
3145              if ( !empty($p_status) ) {
3146                  if ( !empty($q['perm'] ) && 'readable' == $q['perm'] && !current_user_can($read_private_cap) )
3147                      $statuswheres[] = "($wpdb->posts.post_author = $user_id " . "AND (" . join( ' OR ', $p_status ) . "))";
3148                  else
3149                      $statuswheres[] = "(" . join( ' OR ', $p_status ) . ")";
3150              }
3151              if ( $post_status_join ) {
3152                  $join .= " LEFT JOIN $wpdb->posts AS p2 ON ($wpdb->posts.post_parent = p2.ID) ";
3153                  foreach ( $statuswheres as $index => $statuswhere )
3154                      $statuswheres[$index] = "($statuswhere OR ($wpdb->posts.post_status = 'inherit' AND " . str_replace($wpdb->posts, 'p2', $statuswhere) . "))";
3155              }
3156              $where_status = implode( ' OR ', $statuswheres );
3157              if ( ! empty( $where_status ) ) {
3158                  $where .= " AND ($where_status)";
3159              }
3160          } elseif ( !$this->is_singular ) {
3161              $where .= " AND ($wpdb->posts.post_status = 'publish'";
3162  
3163              // Add public states.
3164              $public_states = get_post_stati( array('public' => true) );
3165              foreach ( (array) $public_states as $state ) {
3166                  if ( 'publish' == $state ) // Publish is hard-coded above.
3167                      continue;
3168                  $where .= " OR $wpdb->posts.post_status = '$state'";
3169              }
3170  
3171              if ( $this->is_admin ) {
3172                  // Add protected states that should show in the admin all list.
3173                  $admin_all_states = get_post_stati( array('protected' => true, 'show_in_admin_all_list' => true) );
3174                  foreach ( (array) $admin_all_states as $state )
3175                      $where .= " OR $wpdb->posts.post_status = '$state'";
3176              }
3177  
3178              if ( is_user_logged_in() ) {
3179                  // Add private states that are limited to viewing by the author of a post or someone who has caps to read private states.
3180                  $private_states = get_post_stati( array('private' => true) );
3181                  foreach ( (array) $private_states as $state )
3182                      $where .= current_user_can( $read_private_cap ) ? " OR $wpdb->posts.post_status = '$state'" : " OR $wpdb->posts.post_author = $user_id AND $wpdb->posts.post_status = '$state'";
3183              }
3184  
3185              $where .= ')';
3186          }
3187  
3188          /*
3189           * Apply filters on where and join prior to paging so that any
3190           * manipulations to them are reflected in the paging by day queries.
3191           */
3192          if ( !$q['suppress_filters'] ) {
3193              /**
3194               * Filters the WHERE clause of the query.
3195               *
3196               * @since 1.5.0
3197               *
3198               * @param string   $where The WHERE clause of the query.
3199               * @param WP_Query &$this The WP_Query instance (passed by reference).
3200               */
3201              $where = apply_filters_ref_array( 'posts_where', array( $where, &$this ) );
3202  
3203              /**
3204               * Filters the JOIN clause of the query.
3205               *
3206               * @since 1.5.0
3207               *
3208               * @param string   $where The JOIN clause of the query.
3209               * @param WP_Query &$this The WP_Query instance (passed by reference).
3210               */
3211              $join = apply_filters_ref_array( 'posts_join', array( $join, &$this ) );
3212          }
3213  
3214          // Paging
3215          if ( empty($q['nopaging']) && !$this->is_singular ) {
3216              $page = absint($q['paged']);
3217              if ( !$page )
3218                  $page = 1;
3219  
3220              // If 'offset' is provided, it takes precedence over 'paged'.
3221              if ( isset( $q['offset'] ) && is_numeric( $q['offset'] ) ) {
3222                  $q['offset'] = absint( $q['offset'] );
3223                  $pgstrt = $q['offset'] . ', ';
3224              } else {
3225                  $pgstrt = absint( ( $page - 1 ) * $q['posts_per_page'] ) . ', ';
3226              }
3227              $limits = 'LIMIT ' . $pgstrt . $q['posts_per_page'];
3228          }
3229  
3230          // Comments feeds
3231          if ( $this->is_comment_feed && ! $this->is_singular ) {
3232              if ( $this->is_archive || $this->is_search ) {
3233                  $cjoin = "JOIN $wpdb->posts ON ($wpdb->comments.comment_post_ID = $wpdb->posts.ID) $join ";
3234                  $cwhere = "WHERE comment_approved = '1' $where";
3235                  $cgroupby = "$wpdb->comments.comment_id";
3236              } else { // Other non singular e.g. front
3237                  $cjoin = "JOIN $wpdb->posts ON ( $wpdb->comments.comment_post_ID = $wpdb->posts.ID )";
3238                  $cwhere = "WHERE ( post_status = 'publish' OR ( post_status = 'inherit' && post_type = 'attachment' ) ) AND comment_approved = '1'";
3239                  $cgroupby = '';
3240              }
3241  
3242              if ( !$q['suppress_filters'] ) {
3243                  /**
3244                   * Filters the JOIN clause of the comments feed query before sending.
3245                   *
3246                   * @since 2.2.0
3247                   *
3248                   * @param string   $cjoin The JOIN clause of the query.
3249                   * @param WP_Query &$this The WP_Query instance (passed by reference).
3250                   */
3251                  $cjoin = apply_filters_ref_array( 'comment_feed_join', array( $cjoin, &$this ) );
3252  
3253                  /**
3254                   * Filters the WHERE clause of the comments feed query before sending.
3255                   *
3256                   * @since 2.2.0
3257                   *
3258                   * @param string   $cwhere The WHERE clause of the query.
3259                   * @param WP_Query &$this  The WP_Query instance (passed by reference).
3260                   */
3261                  $cwhere = apply_filters_ref_array( 'comment_feed_where', array( $cwhere, &$this ) );
3262  
3263                  /**
3264                   * Filters the GROUP BY clause of the comments feed query before sending.
3265                   *
3266                   * @since 2.2.0
3267                   *
3268                   * @param string   $cgroupby The GROUP BY clause of the query.
3269                   * @param WP_Query &$this    The WP_Query instance (passed by reference).
3270                   */
3271                  $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( $cgroupby, &$this ) );
3272  
3273                  /**
3274                   * Filters the ORDER BY clause of the comments feed query before sending.
3275                   *
3276                   * @since 2.8.0
3277                   *
3278                   * @param string   $corderby The ORDER BY clause of the query.
3279                   * @param WP_Query &$this    The WP_Query instance (passed by reference).
3280                   */
3281                  $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) );
3282  
3283                  /**
3284                   * Filters the LIMIT clause of the comments feed query before sending.
3285                   *
3286                   * @since 2.8.0
3287                   *
3288                   * @param string   $climits The JOIN clause of the query.
3289                   * @param WP_Query &$this   The WP_Query instance (passed by reference).
3290                   */
3291                  $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) );
3292              }
3293              $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
3294              $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : '';
3295  
3296              $comments = (array) $wpdb->get_results("SELECT $distinct $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits");
3297              // Convert to WP_Comment
3298              $this->comments = array_map( 'get_comment', $comments );
3299              $this->comment_count = count($this->comments);
3300  
3301              $post_ids = array();
3302  
3303              foreach ( $this->comments as $comment )
3304                  $post_ids[] = (int) $comment->comment_post_ID;
3305  
3306              $post_ids = join(',', $post_ids);
3307              $join = '';
3308              if ( $post_ids )
3309                  $where = "AND $wpdb->posts.ID IN ($post_ids) ";
3310              else
3311                  $where = "AND 0";
3312          }
3313  
3314          $pieces = array( 'where', 'groupby', 'join', 'orderby', 'distinct', 'fields', 'limits' );
3315  
3316          /*
3317           * Apply post-paging filters on where and join. Only plugins that
3318           * manipulate paging queries should use these hooks.
3319           */
3320          if ( !$q['suppress_filters'] ) {
3321              /**
3322               * Filters the WHERE clause of the query.
3323               *
3324               * Specifically for manipulating paging queries.
3325               *
3326               * @since 1.5.0
3327               *
3328               * @param string   $where The WHERE clause of the query.
3329               * @param WP_Query &$this The WP_Query instance (passed by reference).
3330               */
3331              $where = apply_filters_ref_array( 'posts_where_paged', array( $where, &$this ) );
3332  
3333              /**
3334               * Filters the GROUP BY clause of the query.
3335               *
3336               * @since 2.0.0
3337               *
3338               * @param string   $groupby The GROUP BY clause of the query.
3339               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3340               */
3341              $groupby = apply_filters_ref_array( 'posts_groupby', array( $groupby, &$this ) );
3342  
3343              /**
3344               * Filters the JOIN clause of the query.
3345               *
3346               * Specifically for manipulating paging queries.
3347               *
3348               * @since 1.5.0
3349               *
3350               * @param string   $join  The JOIN clause of the query.
3351               * @param WP_Query &$this The WP_Query instance (passed by reference).
3352               */
3353              $join = apply_filters_ref_array( 'posts_join_paged', array( $join, &$this ) );
3354  
3355              /**
3356               * Filters the ORDER BY clause of the query.
3357               *
3358               * @since 1.5.1
3359               *
3360               * @param string   $orderby The ORDER BY clause of the query.
3361               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3362               */
3363              $orderby = apply_filters_ref_array( 'posts_orderby', array( $orderby, &$this ) );
3364  
3365              /**
3366               * Filters the DISTINCT clause of the query.
3367               *
3368               * @since 2.1.0
3369               *
3370               * @param string   $distinct The DISTINCT clause of the query.
3371               * @param WP_Query &$this    The WP_Query instance (passed by reference).
3372               */
3373              $distinct = apply_filters_ref_array( 'posts_distinct', array( $distinct, &$this ) );
3374  
3375              /**
3376               * Filters the LIMIT clause of the query.
3377               *
3378               * @since 2.1.0
3379               *
3380               * @param string   $limits The LIMIT clause of the query.
3381               * @param WP_Query &$this  The WP_Query instance (passed by reference).
3382               */
3383              $limits = apply_filters_ref_array( 'post_limits', array( $limits, &$this ) );
3384  
3385              /**
3386               * Filters the SELECT clause of the query.
3387               *
3388               * @since 2.1.0
3389               *
3390               * @param string   $fields The SELECT clause of the query.
3391               * @param WP_Query &$this  The WP_Query instance (passed by reference).
3392               */
3393              $fields = apply_filters_ref_array( 'posts_fields', array( $fields, &$this ) );
3394  
3395              /**
3396               * Filters all query clauses at once, for convenience.
3397               *
3398               * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT,
3399               * fields (SELECT), and LIMITS clauses.
3400               *
3401               * @since 3.1.0
3402               *
3403               * @param array    $clauses The list of clauses for the query.
3404               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3405               */
3406              $clauses = (array) apply_filters_ref_array( 'posts_clauses', array( compact( $pieces ), &$this ) );
3407  
3408              $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
3409              $groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';
3410              $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
3411              $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
3412              $distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : '';
3413              $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
3414              $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
3415          }
3416  
3417          /**
3418           * Fires to announce the query's current selection parameters.
3419           *
3420           * For use by caching plugins.
3421           *
3422           * @since 2.3.0
3423           *
3424           * @param string $selection The assembled selection query.
3425           */
3426          do_action( 'posts_selection', $where . $groupby . $orderby . $limits . $join );
3427  
3428          /*
3429           * Filters again for the benefit of caching plugins.
3430           * Regular plugins should use the hooks above.
3431           */
3432          if ( !$q['suppress_filters'] ) {
3433              /**
3434               * Filters the WHERE clause of the query.
3435               *
3436               * For use by caching plugins.
3437               *
3438               * @since 2.5.0
3439               *
3440               * @param string   $where The WHERE clause of the query.
3441               * @param WP_Query &$this The WP_Query instance (passed by reference).
3442               */
3443              $where = apply_filters_ref_array( 'posts_where_request', array( $where, &$this ) );
3444  
3445              /**
3446               * Filters the GROUP BY clause of the query.
3447               *
3448               * For use by caching plugins.
3449               *
3450               * @since 2.5.0
3451               *
3452               * @param string   $groupby The GROUP BY clause of the query.
3453               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3454               */
3455              $groupby = apply_filters_ref_array( 'posts_groupby_request', array( $groupby, &$this ) );
3456  
3457              /**
3458               * Filters the JOIN clause of the query.
3459               *
3460               * For use by caching plugins.
3461               *
3462               * @since 2.5.0
3463               *
3464               * @param string   $join  The JOIN clause of the query.
3465               * @param WP_Query &$this The WP_Query instance (passed by reference).
3466               */
3467              $join = apply_filters_ref_array( 'posts_join_request', array( $join, &$this ) );
3468  
3469              /**
3470               * Filters the ORDER BY clause of the query.
3471               *
3472               * For use by caching plugins.
3473               *
3474               * @since 2.5.0
3475               *
3476               * @param string   $orderby The ORDER BY clause of the query.
3477               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3478               */
3479              $orderby = apply_filters_ref_array( 'posts_orderby_request', array( $orderby, &$this ) );
3480  
3481              /**
3482               * Filters the DISTINCT clause of the query.
3483               *
3484               * For use by caching plugins.
3485               *
3486               * @since 2.5.0
3487               *
3488               * @param string   $distinct The DISTINCT clause of the query.
3489               * @param WP_Query &$this    The WP_Query instance (passed by reference).
3490               */
3491              $distinct = apply_filters_ref_array( 'posts_distinct_request', array( $distinct, &$this ) );
3492  
3493              /**
3494               * Filters the SELECT clause of the query.
3495               *
3496               * For use by caching plugins.
3497               *
3498               * @since 2.5.0
3499               *
3500               * @param string   $fields The SELECT clause of the query.
3501               * @param WP_Query &$this  The WP_Query instance (passed by reference).
3502               */
3503              $fields = apply_filters_ref_array( 'posts_fields_request', array( $fields, &$this ) );
3504  
3505              /**
3506               * Filters the LIMIT clause of the query.
3507               *
3508               * For use by caching plugins.
3509               *
3510               * @since 2.5.0
3511               *
3512               * @param string   $limits The LIMIT clause of the query.
3513               * @param WP_Query &$this  The WP_Query instance (passed by reference).
3514               */
3515              $limits = apply_filters_ref_array( 'post_limits_request', array( $limits, &$this ) );
3516  
3517              /**
3518               * Filters all query clauses at once, for convenience.
3519               *
3520               * For use by caching plugins.
3521               *
3522               * Covers the WHERE, GROUP BY, JOIN, ORDER BY, DISTINCT,
3523               * fields (SELECT), and LIMITS clauses.
3524               *
3525               * @since 3.1.0
3526               *
3527               * @param array    $pieces The pieces of the query.
3528               * @param WP_Query &$this  The WP_Query instance (passed by reference).
3529               */
3530              $clauses = (array) apply_filters_ref_array( 'posts_clauses_request', array( compact( $pieces ), &$this ) );
3531  
3532              $where = isset( $clauses[ 'where' ] ) ? $clauses[ 'where' ] : '';
3533              $groupby = isset( $clauses[ 'groupby' ] ) ? $clauses[ 'groupby' ] : '';
3534              $join = isset( $clauses[ 'join' ] ) ? $clauses[ 'join' ] : '';
3535              $orderby = isset( $clauses[ 'orderby' ] ) ? $clauses[ 'orderby' ] : '';
3536              $distinct = isset( $clauses[ 'distinct' ] ) ? $clauses[ 'distinct' ] : '';
3537              $fields = isset( $clauses[ 'fields' ] ) ? $clauses[ 'fields' ] : '';
3538              $limits = isset( $clauses[ 'limits' ] ) ? $clauses[ 'limits' ] : '';
3539          }
3540  
3541          if ( ! empty($groupby) )
3542              $groupby = 'GROUP BY ' . $groupby;
3543          if ( !empty( $orderby ) )
3544              $orderby = 'ORDER BY ' . $orderby;
3545  
3546          $found_rows = '';
3547          if ( !$q['no_found_rows'] && !empty($limits) )
3548              $found_rows = 'SQL_CALC_FOUND_ROWS';
3549  
3550          $this->request = $old_request = "SELECT $found_rows $distinct $fields FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
3551  
3552          if ( !$q['suppress_filters'] ) {
3553              /**
3554               * Filters the completed SQL query before sending.
3555               *
3556               * @since 2.0.0
3557               *
3558               * @param string   $request The complete SQL query.
3559               * @param WP_Query &$this   The WP_Query instance (passed by reference).
3560               */
3561              $this->request = apply_filters_ref_array( 'posts_request', array( $this->request, &$this ) );
3562          }
3563  
3564          /**
3565           * Filters the posts array before the query takes place.
3566           *
3567           * Return a non-null value to bypass WordPress's default post queries.
3568           *
3569           * Filtering functions that require pagination information are encouraged to set
3570           * the `found_posts` and `max_num_pages` properties of the WP_Query object,
3571           * passed to the filter by reference. If WP_Query does not perform a database
3572           * query, it will not have enough information to generate these values itself.
3573           *
3574           * @since 4.6.0
3575           *
3576           * @param array|null $posts Return an array of post data to short-circuit WP's query,
3577           *                          or null to allow WP to run its normal queries.
3578           * @param WP_Query   $this  The WP_Query instance, passed by reference.
3579           */
3580          $this->posts = apply_filters_ref_array( 'posts_pre_query', array( null, &$this ) );
3581  
3582          if ( 'ids' == $q['fields'] ) {
3583              if ( null === $this->posts ) {
3584                  $this->posts = $wpdb->get_col( $this->request );
3585              }
3586  
3587              $this->posts = array_map( 'intval', $this->posts );
3588              $this->post_count = count( $this->posts );
3589              $this->set_found_posts( $q, $limits );
3590  
3591              return $this->posts;
3592          }
3593  
3594          if ( 'id=>parent' == $q['fields'] ) {
3595              if ( null === $this->posts ) {
3596                  $this->posts = $wpdb->get_results( $this->request );
3597              }
3598  
3599              $this->post_count = count( $this->posts );
3600              $this->set_found_posts( $q, $limits );
3601  
3602              $r = array();
3603              foreach ( $this->posts as $key => $post ) {
3604                  $this->posts[ $key ]->ID = (int) $post->ID;
3605                  $this->posts[ $key ]->post_parent = (int) $post->post_parent;
3606  
3607                  $r[ (int) $post->ID ] = (int) $post->post_parent;
3608              }
3609  
3610              return $r;
3611          }
3612  
3613          if ( null === $this->posts ) {
3614              $split_the_query = ( $old_request == $this->request && "$wpdb->posts.*" == $fields && !empty( $limits ) && $q['posts_per_page'] < 500 );
3615  
3616              /**
3617               * Filters whether to split the query.
3618               *
3619               * Splitting the query will cause it to fetch just the IDs of the found posts
3620               * (and then individually fetch each post by ID), rather than fetching every
3621               * complete row at once. One massive result vs. many small results.
3622               *
3623               * @since 3.4.0
3624               *
3625               * @param bool     $split_the_query Whether or not to split the query.
3626               * @param WP_Query $this            The WP_Query instance.
3627               */
3628              $split_the_query = apply_filters( 'split_the_query', $split_the_query, $this );
3629  
3630              if ( $split_the_query ) {
3631                  // First get the IDs and then fill in the objects
3632  
3633                  $this->request = "SELECT $found_rows $distinct $wpdb->posts.ID FROM $wpdb->posts $join WHERE 1=1 $where $groupby $orderby $limits";
3634  
3635                  /**
3636                   * Filters the Post IDs SQL request before sending.
3637                   *
3638                   * @since 3.4.0
3639                   *
3640                   * @param string   $request The post ID request.
3641                   * @param WP_Query $this    The WP_Query instance.
3642                   */
3643                  $this->request = apply_filters( 'posts_request_ids', $this->request, $this );
3644  
3645                  $ids = $wpdb->get_col( $this->request );
3646  
3647                  if ( $ids ) {
3648                      $this->posts = $ids;
3649                      $this->set_found_posts( $q, $limits );
3650                      _prime_post_caches( $ids, $q['update_post_term_cache'], $q['update_post_meta_cache'] );
3651                  } else {
3652                      $this->posts = array();
3653                  }
3654              } else {
3655                  $this->posts = $wpdb->get_results( $this->request );
3656                  $this->set_found_posts( $q, $limits );
3657              }
3658          }
3659  
3660          // Convert to WP_Post objects.
3661          if ( $this->posts ) {
3662              $this->posts = array_map( 'get_post', $this->posts );
3663          }
3664  
3665          if ( ! $q['suppress_filters'] ) {
3666              /**
3667               * Filters the raw post results array, prior to status checks.
3668               *
3669               * @since 2.3.0
3670               *
3671               * @param array    $posts The post results array.
3672               * @param WP_Query &$this The WP_Query instance (passed by reference).
3673               */
3674              $this->posts = apply_filters_ref_array( 'posts_results', array( $this->posts, &$this ) );
3675          }
3676  
3677          if ( !empty($this->posts) && $this->is_comment_feed && $this->is_singular ) {
3678              /** This filter is documented in wp-includes/query.php */
3679              $cjoin = apply_filters_ref_array( 'comment_feed_join', array( '', &$this ) );
3680  
3681              /** This filter is documented in wp-includes/query.php */
3682              $cwhere = apply_filters_ref_array( 'comment_feed_where', array( "WHERE comment_post_ID = '{$this->posts[0]->ID}' AND comment_approved = '1'", &$this ) );
3683  
3684              /** This filter is documented in wp-includes/query.php */
3685              $cgroupby = apply_filters_ref_array( 'comment_feed_groupby', array( '', &$this ) );
3686              $cgroupby = ( ! empty( $cgroupby ) ) ? 'GROUP BY ' . $cgroupby : '';
3687  
3688              /** This filter is documented in wp-includes/query.php */
3689              $corderby = apply_filters_ref_array( 'comment_feed_orderby', array( 'comment_date_gmt DESC', &$this ) );
3690              $corderby = ( ! empty( $corderby ) ) ? 'ORDER BY ' . $corderby : '';
3691  
3692              /** This filter is documented in wp-includes/query.php */
3693              $climits = apply_filters_ref_array( 'comment_feed_limits', array( 'LIMIT ' . get_option('posts_per_rss'), &$this ) );
3694  
3695              $comments_request = "SELECT $wpdb->comments.* FROM $wpdb->comments $cjoin $cwhere $cgroupby $corderby $climits";
3696              $comments = $wpdb->get_results($comments_request);
3697              // Convert to WP_Comment
3698              $this->comments = array_map( 'get_comment', $comments );
3699              $this->comment_count = count($this->comments);
3700          }
3701  
3702          // Check post status to determine if post should be displayed.
3703          if ( !empty($this->posts) && ($this->is_single || $this->is_page) ) {
3704              $status = get_post_status($this->posts[0]);
3705              if ( 'attachment' === $this->posts[0]->post_type && 0 === (int) $this->posts[0]->post_parent ) {
3706                  $this->is_page = false;
3707                  $this->is_single = true;
3708                  $this->is_attachment = true;
3709              }
3710              $post_status_obj = get_post_status_object($status);
3711  
3712              // If the post_status was specifically requested, let it pass through.
3713              if ( !$post_status_obj->public && ! in_array( $status, $q_status ) ) {
3714  
3715                  if ( ! is_user_logged_in() ) {
3716                      // User must be logged in to view unpublished posts.
3717                      $this->posts = array();
3718                  } else {
3719                      if  ( $post_status_obj->protected ) {
3720                          // User must have edit permissions on the draft to preview.
3721                          if ( ! current_user_can($edit_cap, $this->posts[0]->ID) ) {
3722                              $this->posts = array();
3723                          } else {
3724                              $this->is_preview = true;
3725                              if ( 'future' != $status )
3726                                  $this->posts[0]->post_date = current_time('mysql');
3727                          }
3728                      } elseif ( $post_status_obj->private ) {
3729                          if ( ! current_user_can($read_cap, $this->posts[0]->ID) )
3730                              $this->posts = array();
3731                      } else {
3732                          $this->posts = array();
3733                      }
3734                  }
3735              }
3736  
3737              if ( $this->is_preview && $this->posts && current_user_can( $edit_cap, $this->posts[0]->ID ) ) {
3738                  /**
3739                   * Filters the single post for preview mode.
3740                   *
3741                   * @since 2.7.0
3742                   *
3743                   * @param WP_Post  $post_preview  The Post object.
3744                   * @param WP_Query &$this         The WP_Query instance (passed by reference).
3745                   */
3746                  $this->posts[0] = get_post( apply_filters_ref_array( 'the_preview', array( $this->posts[0], &$this ) ) );
3747              }
3748          }
3749  
3750          // Put sticky posts at the top of the posts array
3751          $sticky_posts = get_option('sticky_posts');
3752          if ( $this->is_home && $page <= 1 && is_array($sticky_posts) && !empty($sticky_posts) && !$q['ignore_sticky_posts'] ) {
3753              $num_posts = count($this->posts);
3754              $sticky_offset = 0;
3755              // Loop over posts and relocate stickies to the front.
3756              for ( $i = 0; $i < $num_posts; $i++ ) {
3757                  if ( in_array($this->posts[$i]->ID, $sticky_posts) ) {
3758                      $sticky_post = $this->posts[$i];
3759                      // Remove sticky from current position
3760                      array_splice($this->posts, $i, 1);
3761                      // Move to front, after other stickies
3762                      array_splice($this->posts, $sticky_offset, 0, array($sticky_post));
3763                      // Increment the sticky offset. The next sticky will be placed at this offset.
3764                      $sticky_offset++;
3765                      // Remove post from sticky posts array
3766                      $offset = array_search($sticky_post->ID, $sticky_posts);
3767                      unset( $sticky_posts[$offset] );
3768                  }
3769              }
3770  
3771              // If any posts have been excluded specifically, Ignore those that are sticky.
3772              if ( !empty($sticky_posts) && !empty($q['post__not_in']) )
3773                  $sticky_posts = array_diff($sticky_posts, $q['post__not_in']);
3774  
3775              // Fetch sticky posts that weren't in the query results
3776              if ( !empty($sticky_posts) ) {
3777                  $stickies = get_posts( array(
3778                      'post__in' => $sticky_posts,
3779                      'post_type' => $post_type,
3780                      'post_status' => 'publish',
3781                      'nopaging' => true
3782                  ) );
3783  
3784                  foreach ( $stickies as $sticky_post ) {
3785                      array_splice( $this->posts, $sticky_offset, 0, array( $sticky_post ) );
3786                      $sticky_offset++;
3787                  }
3788              }
3789          }
3790  
3791          // If comments have been fetched as part of the query, make sure comment meta lazy-loading is set up.
3792          if ( ! empty( $this->comments ) ) {
3793              wp_queue_comments_for_comment_meta_lazyload( $this->comments );
3794          }
3795  
3796          if ( ! $q['suppress_filters'] ) {
3797              /**
3798               * Filters the array of retrieved posts after they've been fetched and
3799               * internally processed.
3800               *
3801               * @since 1.5.0
3802               *
3803               * @param array    $posts The array of retrieved posts.
3804               * @param WP_Query &$this The WP_Query instance (passed by reference).
3805               */
3806              $this->posts = apply_filters_ref_array( 'the_posts', array( $this->posts, &$this ) );
3807          }
3808  
3809          // Ensure that any posts added/modified via one of the filters above are
3810          // of the type WP_Post and are filtered.
3811          if ( $this->posts ) {
3812              $this->post_count = count( $this->posts );
3813  
3814              $this->posts = array_map( 'get_post', $this->posts );
3815  
3816              if ( $q['cache_results'] )
3817                  update_post_caches($this->posts, $post_type, $q['update_post_term_cache'], $q['update_post_meta_cache']);
3818  
3819              $this->post = reset( $this->posts );
3820          } else {
3821              $this->post_count = 0;
3822              $this->posts = array();
3823          }
3824  
3825          if ( $q['lazy_load_term_meta'] ) {
3826              wp_queue_posts_for_term_meta_lazyload( $this->posts );
3827          }
3828  
3829          return $this->posts;
3830      }
3831  
3832      /**
3833       * Set up the amount of found posts and the number of pages (if limit clause was used)
3834       * for the current query.
3835       *
3836       * @since 3.5.0
3837       * @access private
3838       *
3839       * @global wpdb $wpdb WordPress database abstraction object.
3840       *
3841       * @param array  $q      Query variables.
3842       * @param string $limits LIMIT clauses of the query.
3843       */
3844  	private function set_found_posts( $q, $limits ) {
3845          global $wpdb;
3846  
3847          // Bail if posts is an empty array. Continue if posts is an empty string,
3848          // null, or false to accommodate caching plugins that fill posts later.
3849          if ( $q['no_found_rows'] || ( is_array( $this->posts ) && ! $this->posts ) )
3850              return;
3851  
3852          if ( ! empty( $limits ) ) {
3853              /**
3854               * Filters the query to run for retrieving the found posts.
3855               *
3856               * @since 2.1.0
3857               *
3858               * @param string   $found_posts The query to run to find the found posts.
3859               * @param WP_Query &$this       The WP_Query instance (passed by reference).
3860               */
3861              $this->found_posts = $wpdb->get_var( apply_filters_ref_array( 'found_posts_query', array( 'SELECT FOUND_ROWS()', &$this ) ) );
3862          } else {
3863              $this->found_posts = count( $this->posts );
3864          }
3865  
3866          /**
3867           * Filters the number of found posts for the query.
3868           *
3869           * @since 2.1.0
3870           *
3871           * @param int      $found_posts The number of posts found.
3872           * @param WP_Query &$this       The WP_Query instance (passed by reference).
3873           */
3874          $this->found_posts = apply_filters_ref_array( 'found_posts', array( $this->found_posts, &$this ) );
3875  
3876          if ( ! empty( $limits ) )
3877              $this->max_num_pages = ceil( $this->found_posts / $q['posts_per_page'] );
3878      }
3879  
3880      /**
3881       * Set up the next post and iterate current post index.
3882       *
3883       * @since 1.5.0
3884       * @access public
3885       *
3886       * @return WP_Post Next post.
3887       */
3888  	public function next_post() {
3889  
3890          $this->current_post++;
3891  
3892          $this->post = $this->posts[$this->current_post];
3893          return $this->post;
3894      }
3895  
3896      /**
3897       * Sets up the current post.
3898       *
3899       * Retrieves the next post, sets up the post, sets the 'in the loop'
3900       * property to true.
3901       *
3902       * @since 1.5.0
3903       * @access public
3904       *
3905       * @global WP_Post $post
3906       */
3907  	public function the_post() {
3908          global $post;
3909          $this->in_the_loop = true;
3910  
3911          if ( $this->current_post == -1 ) // loop has just started
3912              /**
3913               * Fires once the loop is started.
3914               *
3915               * @since 2.0.0
3916               *
3917               * @param WP_Query &$this The WP_Query instance (passed by reference).
3918               */
3919              do_action_ref_array( 'loop_start', array( &$this ) );
3920  
3921          $post = $this->next_post();
3922          $this->setup_postdata( $post );
3923      }
3924  
3925      /**
3926       * Determines whether there are more posts available in the loop.
3927       *
3928       * Calls the {@see 'loop_end'} action when the loop is complete.
3929       *
3930       * @since 1.5.0
3931       * @access public
3932       *
3933       * @return bool True if posts are available, false if end of loop.
3934       */
3935  	public function have_posts() {
3936          if ( $this->current_post + 1 < $this->post_count ) {
3937              return true;
3938          } elseif ( $this->current_post + 1 == $this->post_count && $this->post_count > 0 ) {
3939              /**
3940               * Fires once the loop has ended.
3941               *
3942               * @since 2.0.0
3943               *
3944               * @param WP_Query &$this The WP_Query instance (passed by reference).
3945               */
3946              do_action_ref_array( 'loop_end', array( &$this ) );
3947              // Do some cleaning up after the loop
3948              $this->rewind_posts();
3949          }
3950  
3951          $this->in_the_loop = false;
3952          return false;
3953      }
3954  
3955      /**
3956       * Rewind the posts and reset post index.
3957       *
3958       * @since 1.5.0
3959       * @access public
3960       */
3961  	public function rewind_posts() {
3962          $this->current_post = -1;
3963          if ( $this->post_count > 0 ) {
3964              $this->post = $this->posts[0];
3965          }
3966      }
3967  
3968      /**
3969       * Iterate current comment index and return WP_Comment object.
3970       *
3971       * @since 2.2.0
3972       * @access public
3973       *
3974       * @return WP_Comment Comment object.
3975       */
3976  	public function next_comment() {
3977          $this->current_comment++;
3978  
3979          $this->comment = $this->comments[$this->current_comment];
3980          return $this->comment;
3981      }
3982  
3983      /**
3984       * Sets up the current comment.
3985       *
3986       * @since 2.2.0
3987       * @access public
3988       * @global WP_Comment $comment Current comment.
3989       */
3990  	public function the_comment() {
3991          global $comment;
3992  
3993          $comment = $this->next_comment();
3994  
3995          if ( $this->current_comment == 0 ) {
3996              /**
3997               * Fires once the comment loop is started.
3998               *
3999               * @since 2.2.0
4000               */
4001              do_action( 'comment_loop_start' );
4002          }
4003      }
4004  
4005      /**
4006       * Whether there are more comments available.
4007       *
4008       * Automatically rewinds comments when finished.
4009       *
4010       * @since 2.2.0
4011       * @access public
4012       *
4013       * @return bool True, if more comments. False, if no more posts.
4014       */
4015  	public function have_comments() {
4016          if ( $this->current_comment + 1 < $this->comment_count ) {
4017              return true;
4018          } elseif ( $this->current_comment + 1 == $this->comment_count ) {
4019              $this->rewind_comments();
4020          }
4021  
4022          return false;
4023      }
4024  
4025      /**
4026       * Rewind the comments, resets the comment index and comment to first.
4027       *
4028       * @since 2.2.0
4029       * @access public
4030       */
4031  	public function rewind_comments() {
4032          $this->current_comment = -1;
4033          if ( $this->comment_count > 0 ) {
4034              $this->comment = $this->comments[0];
4035          }
4036      }
4037  
4038      /**
4039       * Sets up the WordPress query by parsing query string.
4040       *
4041       * @since 1.5.0
4042       * @access public
4043       *
4044       * @param string $query URL query string.
4045       * @return array List of posts.
4046       */
4047  	public function query( $query ) {
4048          $this->init();
4049          $this->query = $this->query_vars = wp_parse_args( $query );
4050          return $this->get_posts();
4051      }
4052  
4053      /**
4054       * Retrieve queried object.
4055       *
4056       * If queried object is not set, then the queried object will be set from
4057       * the category, tag, taxonomy, posts page, single post, page, or author
4058       * query variable. After it is set up, it will be returned.
4059       *
4060       * @since 1.5.0
4061       * @access public
4062       *
4063       * @return object
4064       */
4065  	public function get_queried_object() {
4066          if ( isset($this->queried_object) )
4067              return $this->queried_object;
4068  
4069          $this->queried_object = null;
4070          $this->queried_object_id = null;
4071  
4072          if ( $this->is_category || $this->is_tag || $this->is_tax ) {
4073              if ( $this->is_category ) {
4074                  if ( $this->get( 'cat' ) ) {
4075                      $term = get_term( $this->get( 'cat' ), 'category' );
4076                  } elseif ( $this->get( 'category_name' ) ) {
4077                      $term = get_term_by( 'slug', $this->get( 'category_name' ), 'category' );
4078                  }
4079              } elseif ( $this->is_tag ) {
4080                  if ( $this->get( 'tag_id' ) ) {
4081                      $term = get_term( $this->get( 'tag_id' ), 'post_tag' );
4082                  } elseif ( $this->get( 'tag' ) ) {
4083                      $term = get_term_by( 'slug', $this->get( 'tag' ), 'post_tag' );
4084                  }
4085              } else {
4086                  // For other tax queries, grab the first term from the first clause.
4087                  $tax_query_in_and = wp_list_filter( $this->tax_query->queried_terms, array( 'operator' => 'NOT IN' ), 'NOT' );
4088  
4089                  if ( ! empty( $tax_query_in_and ) ) {
4090                      $queried_taxonomies = array_keys( $tax_query_in_and );
4091                      $matched_taxonomy = reset( $queried_taxonomies );
4092                      $query = $tax_query_in_and[ $matched_taxonomy ];
4093  
4094                      if ( $query['terms'] ) {
4095                          if ( 'term_id' == $query['field'] ) {
4096                              $term = get_term( reset( $query['terms'] ), $matched_taxonomy );
4097                          } else {
4098                              $term = get_term_by( $query['field'], reset( $query['terms'] ), $matched_taxonomy );
4099                          }
4100                      }
4101                  }
4102              }
4103  
4104              if ( ! empty( $term ) && ! is_wp_error( $term ) )  {
4105                  $this->queried_object = $term;
4106                  $this->queried_object_id = (int) $term->term_id;
4107  
4108                  if ( $this->is_category && 'category' === $this->queried_object->taxonomy )
4109                      _make_cat_compat( $this->queried_object );
4110              }
4111          } elseif ( $this->is_post_type_archive ) {
4112              $post_type = $this->get( 'post_type' );
4113              if ( is_array( $post_type ) )
4114                  $post_type = reset( $post_type );
4115              $this->queried_object = get_post_type_object( $post_type );
4116          } elseif ( $this->is_posts_page ) {
4117              $page_for_posts = get_option('page_for_posts');
4118              $this->queried_object = get_post( $page_for_posts );
4119              $this->queried_object_id = (int) $this->queried_object->ID;
4120          } elseif ( $this->is_singular && ! empty( $this->post ) ) {
4121              $this->queried_object = $this->post;
4122              $this->queried_object_id = (int) $this->post->ID;
4123          } elseif ( $this->is_author ) {
4124              $this->queried_object_id = (int) $this->get('author');
4125              $this->queried_object = get_userdata( $this->queried_object_id );
4126          }
4127  
4128          return $this->queried_object;
4129      }
4130  
4131      /**
4132       * Retrieve ID of the current queried object.
4133       *
4134       * @since 1.5.0
4135       * @access public
4136       *
4137       * @return int
4138       */
4139  	public function get_queried_object_id() {
4140          $this->get_queried_object();
4141  
4142          if ( isset($this->queried_object_id) ) {
4143              return $this->queried_object_id;
4144          }
4145  
4146          return 0;
4147      }
4148  
4149      /**
4150       * Constructor.
4151       *
4152       * Sets up the WordPress query, if parameter is not empty.
4153       *
4154       * @since 1.5.0
4155       * @access public
4156       *
4157       * @param string|array $query URL query string or array of vars.
4158       */
4159  	public function __construct($query = '') {
4160          if ( ! empty($query) ) {
4161              $this->query($query);
4162          }
4163      }
4164  
4165      /**
4166       * Make private properties readable for backward compatibility.
4167       *
4168       * @since 4.0.0
4169       * @access public
4170       *
4171       * @param string $name Property to get.
4172       * @return mixed Property.
4173       */
4174  	public function __get( $name ) {
4175          if ( in_array( $name, $this->compat_fields ) ) {
4176              return $this->$name;
4177          }
4178      }
4179  
4180      /**
4181       * Make private properties checkable for backward compatibility.
4182       *
4183       * @since 4.0.0
4184       * @access public
4185       *
4186       * @param string $name Property to check if set.
4187       * @return bool Whether the property is set.
4188       */
4189  	public function __isset( $name ) {
4190          if ( in_array( $name, $this->compat_fields ) ) {
4191              return isset( $this->$name );
4192          }
4193      }
4194  
4195      /**
4196       * Make private/protected methods readable for backward compatibility.
4197       *
4198       * @since 4.0.0
4199       * @access public
4200       *
4201       * @param callable $name      Method to call.
4202       * @param array    $arguments Arguments to pass when calling.
4203       * @return mixed|false Return value of the callback, false otherwise.
4204       */
4205  	public function __call( $name, $arguments ) {
4206          if ( in_array( $name, $this->compat_methods ) ) {
4207              return call_user_func_array( array( $this, $name ), $arguments );
4208          }
4209          return false;
4210      }
4211  
4212      /**
4213        * Is the query for an existing archive page?
4214        *
4215        * Month, Year, Category, Author, Post Type archive...
4216       *
4217        * @since 3.1.0
4218        *
4219        * @return bool
4220        */
4221  	public function is_archive() {
4222          return (bool) $this->is_archive;
4223      }
4224  
4225      /**
4226       * Is the query for an existing post type archive page?
4227       *
4228       * @since 3.1.0
4229       *
4230       * @param mixed $post_types Optional. Post type or array of posts types to check against.
4231       * @return bool
4232       */
4233  	public function is_post_type_archive( $post_types = '' ) {
4234          if ( empty( $post_types ) || ! $this->is_post_type_archive )
4235              return (bool) $this->is_post_type_archive;
4236  
4237          $post_type = $this->get( 'post_type' );
4238          if ( is_array( $post_type ) )
4239              $post_type = reset( $post_type );
4240          $post_type_object = get_post_type_object( $post_type );
4241  
4242          return in_array( $post_type_object->name, (array) $post_types );
4243      }
4244  
4245      /**
4246       * Is the query for an existing attachment page?
4247       *
4248       * @since 3.1.0
4249       *
4250       * @param mixed $attachment Attachment ID, title, slug, or array of such.
4251       * @return bool
4252       */
4253  	public function is_attachment( $attachment = '' ) {
4254          if ( ! $this->is_attachment ) {
4255              return false;
4256          }
4257  
4258          if ( empty( $attachment ) ) {
4259              return true;
4260          }
4261  
4262          $attachment = array_map( 'strval', (array) $attachment );
4263  
4264          $post_obj = $this->get_queried_object();
4265  
4266          if ( in_array( (string) $post_obj->ID, $attachment ) ) {
4267              return true;
4268          } elseif ( in_array( $post_obj->post_title, $attachment ) ) {
4269              return true;
4270          } elseif ( in_array( $post_obj->post_name, $attachment ) ) {
4271              return true;
4272          }
4273          return false;
4274      }
4275  
4276      /**
4277       * Is the query for an existing author archive page?
4278       *
4279       * If the $author parameter is specified, this function will additionally
4280       * check if the query is for one of the authors specified.
4281       *
4282       * @since 3.1.0
4283       *
4284       * @param mixed $author Optional. User ID, nickname, nicename, or array of User IDs, nicknames, and nicenames
4285       * @return bool
4286       */
4287  	public function is_author( $author = '' ) {
4288          if ( !$this->is_author )
4289              return false;
4290  
4291          if ( empty($author) )
4292              return true;
4293  
4294          $author_obj = $this->get_queried_object();
4295  
4296          $author = array_map( 'strval', (array) $author );
4297  
4298          if ( in_array( (string) $author_obj->ID, $author ) )
4299              return true;
4300          elseif ( in_array( $author_obj->nickname, $author ) )
4301              return true;
4302          elseif ( in_array( $author_obj->user_nicename, $author ) )
4303              return true;
4304  
4305          return false;
4306      }
4307  
4308      /**
4309       * Is the query for an existing category archive page?
4310       *
4311       * If the $category parameter is specified, this function will additionally
4312       * check if the query is for one of the categories specified.
4313       *
4314       * @since 3.1.0
4315       *
4316       * @param mixed $category Optional. Category ID, name, slug, or array of Category IDs, names, and slugs.
4317       * @return bool
4318       */
4319  	public function is_category( $category = '' ) {
4320          if ( !$this->is_category )
4321              return false;
4322  
4323          if ( empty($category) )
4324              return true;
4325  
4326          $cat_obj = $this->get_queried_object();
4327  
4328          $category = array_map( 'strval', (array) $category );
4329  
4330          if ( in_array( (string) $cat_obj->term_id, $category ) )
4331              return true;
4332          elseif ( in_array( $cat_obj->name, $category ) )
4333              return true;
4334          elseif ( in_array( $cat_obj->slug, $category ) )
4335              return true;
4336  
4337          return false;
4338      }
4339  
4340      /**
4341       * Is the query for an existing tag archive page?
4342       *
4343       * If the $tag parameter is specified, this function will additionally
4344       * check if the query is for one of the tags specified.
4345       *
4346       * @since 3.1.0
4347       *
4348       * @param mixed $tag Optional. Tag ID, name, slug, or array of Tag IDs, names, and slugs.
4349       * @return bool
4350       */
4351  	public function is_tag( $tag = '' ) {
4352          if ( ! $this->is_tag )
4353              return false;
4354  
4355          if ( empty( $tag ) )
4356              return true;
4357  
4358          $tag_obj = $this->get_queried_object();
4359  
4360          $tag = array_map( 'strval', (array) $tag );
4361  
4362          if ( in_array( (string) $tag_obj->term_id, $tag ) )
4363              return true;
4364          elseif ( in_array( $tag_obj->name, $tag ) )
4365              return true;
4366          elseif ( in_array( $tag_obj->slug, $tag ) )
4367              return true;
4368  
4369          return false;
4370      }
4371  
4372      /**
4373       * Is the query for an existing custom taxonomy archive page?
4374       *
4375       * If the $taxonomy parameter is specified, this function will additionally
4376       * check if the query is for that specific $taxonomy.
4377       *
4378       * If the $term parameter is specified in addition to the $taxonomy parameter,
4379       * this function will additionally check if the query is for one of the terms
4380       * specified.
4381       *
4382       * @since 3.1.0
4383       *
4384       * @global array $wp_taxonomies
4385       *
4386       * @param mixed $taxonomy Optional. Taxonomy slug or slugs.
4387       * @param mixed $term     Optional. Term ID, name, slug or array of Term IDs, names, and slugs.
4388       * @return bool True for custom taxonomy archive pages, false for built-in taxonomies (category and tag archives).
4389       */
4390  	public function is_tax( $taxonomy = '', $term = '' ) {
4391          global $wp_taxonomies;
4392  
4393          if ( !$this->is_tax )
4394              return false;
4395  
4396          if ( empty( $taxonomy ) )
4397              return true;
4398  
4399          $queried_object = $this->get_queried_object();
4400          $tax_array = array_intersect( array_keys( $wp_taxonomies ), (array) $taxonomy );
4401          $term_array = (array) $term;
4402  
4403          // Check that the taxonomy matches.
4404          if ( ! ( isset( $queried_object->taxonomy ) && count( $tax_array ) && in_array( $queried_object->taxonomy, $tax_array ) ) )
4405              return false;
4406  
4407          // Only a Taxonomy provided.
4408          if ( empty( $term ) )
4409              return true;
4410  
4411          return isset( $queried_object->term_id ) &&
4412              count( array_intersect(
4413                  array( $queried_object->term_id, $queried_object->name, $queried_object->slug ),
4414                  $term_array
4415              ) );
4416      }
4417  
4418      /**
4419       * Whether the current URL is within the comments popup window.
4420       *
4421       * @since 3.1.0
4422       * @deprecated 4.5.0
4423       *
4424       * @return bool
4425       */
4426  	public function is_comments_popup() {
4427          _deprecated_function( __FUNCTION__, '4.5.0' );
4428  
4429          return false;
4430      }
4431  
4432      /**
4433       * Is the query for an existing date archive?
4434       *
4435       * @since 3.1.0
4436       *
4437       * @return bool
4438       */
4439  	public function is_date() {
4440          return (bool) $this->is_date;
4441      }
4442  
4443      /**
4444       * Is the query for an existing day archive?
4445       *
4446       * @since 3.1.0
4447       *
4448       * @return bool
4449       */
4450  	public function is_day() {
4451          return (bool) $this->is_day;
4452      }
4453  
4454      /**
4455       * Is the query for a feed?
4456       *
4457       * @since 3.1.0
4458       *
4459       * @param string|array $feeds Optional feed types to check.
4460       * @return bool
4461       */
4462  	public function is_feed( $feeds = '' ) {
4463          if ( empty( $feeds ) || ! $this->is_feed )
4464              return (bool) $this->is_feed;
4465          $qv = $this->get( 'feed' );
4466          if ( 'feed' == $qv )
4467              $qv = get_default_feed();
4468          return in_array( $qv, (array) $feeds );
4469      }
4470  
4471      /**
4472       * Is the query for a comments feed?
4473       *
4474       * @since 3.1.0
4475       *
4476       * @return bool
4477       */
4478  	public function is_comment_feed() {
4479          return (bool) $this->is_comment_feed;
4480      }
4481  
4482      /**
4483       * Is the query for the front page of the site?
4484       *
4485       * This is for what is displayed at your site's main URL.
4486       *
4487       * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_on_front'.
4488       *
4489       * If you set a static page for the front page of your site, this function will return
4490       * true when viewing that page.
4491       *
4492       * Otherwise the same as @see WP_Query::is_home()
4493       *
4494       * @since 3.1.0
4495       *
4496       * @return bool True, if front of site.
4497       */
4498  	public function is_front_page() {
4499          // most likely case
4500          if ( 'posts' == get_option( 'show_on_front') && $this->is_home() )
4501              return true;
4502          elseif ( 'page' == get_option( 'show_on_front') && get_option( 'page_on_front' ) && $this->is_page( get_option( 'page_on_front' ) ) )
4503              return true;
4504          else
4505              return false;
4506      }
4507  
4508      /**
4509       * Is the query for the blog homepage?
4510       *
4511       * This is the page which shows the time based blog content of your site.
4512       *
4513       * Depends on the site's "Front page displays" Reading Settings 'show_on_front' and 'page_for_posts'.
4514       *
4515       * If you set a static page for the front page of your site, this function will return
4516       * true only on the page you set as the "Posts page".
4517       *
4518       * @see WP_Query::is_front_page()
4519       *
4520       * @since 3.1.0
4521       *
4522       * @return bool True if blog view homepage.
4523       */
4524  	public function is_home() {
4525          return (bool) $this->is_home;
4526      }
4527  
4528      /**
4529       * Is the query for an existing month archive?
4530       *
4531       * @since 3.1.0
4532       *
4533       * @return bool
4534       */
4535  	public function is_month() {
4536          return (bool) $this->is_month;
4537      }
4538  
4539      /**
4540       * Is the query for an existing single page?
4541       *
4542       * If the $page parameter is specified, this function will additionally
4543       * check if the query is for one of the pages specified.
4544       *
4545       * @see WP_Query::is_single()
4546       * @see WP_Query::is_singular()
4547       *
4548       * @since 3.1.0
4549       *
4550       * @param int|string|array $page Optional. Page ID, title, slug, path, or array of such. Default empty.
4551       * @return bool Whether the query is for an existing single page.
4552       */
4553  	public function is_page( $page = '' ) {
4554          if ( !$this->is_page )
4555              return false;
4556  
4557          if ( empty( $page ) )
4558              return true;
4559  
4560          $page_obj = $this->get_queried_object();
4561  
4562          $page = array_map( 'strval', (array) $page );
4563  
4564          if ( in_array( (string) $page_obj->ID, $page ) ) {
4565              return true;
4566          } elseif ( in_array( $page_obj->post_title, $page ) ) {
4567              return true;
4568          } elseif ( in_array( $page_obj->post_name, $page ) ) {
4569              return true;
4570          } else {
4571              foreach ( $page as $pagepath ) {
4572                  if ( ! strpos( $pagepath, '/' ) ) {
4573                      continue;
4574                  }
4575                  $pagepath_obj = get_page_by_path( $pagepath );
4576  
4577                  if ( $pagepath_obj && ( $pagepath_obj->ID == $page_obj->ID ) ) {
4578                      return true;
4579                  }
4580              }
4581          }
4582  
4583          return false;
4584      }
4585  
4586      /**
4587       * Is the query for paged result and not for the first page?
4588       *
4589       * @since 3.1.0
4590       *
4591       * @return bool
4592       */
4593  	public function is_paged() {
4594          return (bool) $this->is_paged;
4595      }
4596  
4597      /**
4598       * Is the query for a post or page preview?
4599       *
4600       * @since 3.1.0
4601       *
4602       * @return bool
4603       */
4604  	public function is_preview() {
4605          return (bool) $this->is_preview;
4606      }
4607  
4608      /**
4609       * Is the query for the robots file?
4610       *
4611       * @since 3.1.0
4612       *
4613       * @return bool
4614       */
4615  	public function is_robots() {
4616          return (bool) $this->is_robots;
4617      }
4618  
4619      /**
4620       * Is the query for a search?
4621       *
4622       * @since 3.1.0
4623       *
4624       * @return bool
4625       */
4626  	public function is_search() {
4627          return (bool) $this->is_search;
4628      }
4629  
4630      /**
4631       * Is the query for an existing single post?
4632       *
4633       * Works for any post type, except attachments and pages
4634       *
4635       * If the $post parameter is specified, this function will additionally
4636       * check if the query is for one of the Posts specified.
4637       *
4638       * @see WP_Query::is_page()
4639       * @see WP_Query::is_singular()
4640       *
4641       * @since 3.1.0
4642       *
4643       * @param int|string|array $post Optional. Post ID, title, slug, path, or array of such. Default empty.
4644       * @return bool Whether the query is for an existing single post.
4645       */
4646  	public function is_single( $post = '' ) {
4647          if ( !$this->is_single )
4648              return false;
4649  
4650          if ( empty($post) )
4651              return true;
4652  
4653          $post_obj = $this->get_queried_object();
4654  
4655          $post = array_map( 'strval', (array) $post );
4656  
4657          if ( in_array( (string) $post_obj->ID, $post ) ) {
4658              return true;
4659          } elseif ( in_array( $post_obj->post_title, $post ) ) {
4660              return true;
4661          } elseif ( in_array( $post_obj->post_name, $post ) ) {
4662              return true;
4663          } else {
4664              foreach ( $post as $postpath ) {
4665                  if ( ! strpos( $postpath, '/' ) ) {
4666                      continue;
4667                  }
4668                  $postpath_obj = get_page_by_path( $postpath, OBJECT, $post_obj->post_type );
4669  
4670                  if ( $postpath_obj && ( $postpath_obj->ID == $post_obj->ID ) ) {
4671                      return true;
4672                  }
4673              }
4674          }
4675          return false;
4676      }
4677  
4678      /**
4679       * Is the query for an existing single post of any post type (post, attachment, page, ... )?
4680       *
4681       * If the $post_types parameter is specified, this function will additionally
4682       * check if the query is for one of the Posts Types specified.
4683       *
4684       * @see WP_Query::is_page()
4685       * @see WP_Query::is_single()
4686       *
4687       * @since 3.1.0
4688       *
4689       * @param string|array $post_types Optional. Post type or array of post types. Default empty.
4690       * @return bool Whether the query is for an existing single post of any of the given post types.
4691       */
4692  	public function is_singular( $post_types = '' ) {
4693          if ( empty( $post_types ) || !$this->is_singular )
4694              return (bool) $this->is_singular;
4695  
4696          $post_obj = $this->get_queried_object();
4697  
4698          return in_array( $post_obj->post_type, (array) $post_types );
4699      }
4700  
4701      /**
4702       * Is the query for a specific time?
4703       *
4704       * @since 3.1.0
4705       *
4706       * @return bool
4707       */
4708  	public function is_time() {
4709          return (bool) $this->is_time;
4710      }
4711  
4712      /**
4713       * Is the query for a trackback endpoint call?
4714