id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
13436,Wordpress class_exists() conflicts with __autoload() and php_auto_prepend,galbus,,"== Issue ==

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

http://php.net/manual/en/function.class-exists.php

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:

{{{
<?php
function __autoload($class) {
    include($class.'.php');
}
?>
}}}

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:

{{{
<?php
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.",enhancement,reopened,normal,Future Release,General,3.1,minor,,needs-patch,azizur