[wp-trac] [WordPress Trac] #13436: Wordpress class_exists() conflicts with __autoload() and php_auto_prepend

WordPress Trac wp-trac at lists.automattic.com
Tue May 18 15:51:26 UTC 2010

#13436: Wordpress class_exists() conflicts with __autoload() and php_auto_prepend
 Reporter:  galbus       |       Owner:                                        
     Type:  enhancement  |      Status:  new                                   
 Priority:  normal       |   Milestone:  Unassigned                            
Component:  General      |     Version:  3.0                                   
 Severity:  minor        |    Keywords:  autoload class_exists php_auto_prepend
 == Issue ==

 Wordpress core (and many plugins) use class_exists().


 When Wordpress is integrated with custom/third party applications that use
 php_auto_prepend and autoload() to include/require files based on the
 $class_name parameter this generates errors as class_exists() triggers the
 autoload() and the files cannot be found.

 == To reproduce ==

 Using php_auto_prepend specify a file to include before every page request
 that contains the following PHP code:

 function __autoload($class) {

 Visit any front-end or back-end Wordpress page.

 == Solution ==

 As there is no autoload() function defined in Wordpress core the
 class_exists() should implement the second class_exists() parameter:

 if (!class_exists('ExampleClass', false)) {

 This stops calls to __autoload() and would fix the errors seen when
 integrating Wordpress with apps that implement this.

 I have implemented this and tested it and Wordpress works fine, but I
 can't find out where the SVN repo is for Wordpress 3 Beta 2 (the SVN page
 on the site takes me to 2.x).

 If someone could supply a link for SVN CO of WP3 I can provide the patch.

Ticket URL: <http://core.trac.wordpress.org/ticket/13436>
WordPress Trac <http://core.trac.wordpress.org/>
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