Function: is_null()

Native PHP Function: php.net - US  UK  DE  ES  RU  CN  JP  IN  AU  BR  

Referenced 5 times:

1. /textpattern/lib/IXRClass.php -> line 1337
2. /textpattern/include/txp_prefs.php -> line 603
3. /textpattern/publish/taghandlers.php -> line 4537
4. /textpattern/lib/txplib_misc.php -> line 1371
5. /textpattern/lib/txplib_misc.php -> line 1555