phpSimpleDoc

phpSimpleDoc is a documentation generator ; it generates HTML documentation from PHP source code.
Released under the terms of the General Public Licence (GPL), version 3 or later.

Requires PHP 5.2 or higher.

This project started in november 2007 ; it is hosted by sourceforge.net since june 2008.

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Examples of API documentations generated by phpSimpleDoc :

PHP Frameworks
CakePHP	Browse	Download
Symfony	Browse	Download
Zend Framework	Browse	Download
CodeIgniter	Browse	Download
CMS
Joomla	Browse	Download
Wordpress	Browse	Download
Miscelaneous
phpSimpleDoc	Browse		The program documented by itself
PHP built-in classes and functions	Browse		This documentation only lists the elements without their descriptions, but there is at least one useful page : the php class hierarchy, which shows class and interface inheritances of PHP built-in classes.