See /lib/classes/component.php, line 73:
* Class loader for Frankenstyle named classes in standard locations.
* Frankenstyle namespaces are supported.
*
* The expected location for core classes is:
* 1/ core_xx_yy_zz ---> lib/classes/xx_yy_zz.php
* 2/ \core\xx_yy_zz ---> lib/classes/xx_yy_zz.php
* 3/ \core\xx\yy_zz ---> lib/classes/xx/yy_zz.php
*
* The expected location for plugin classes is:
* 1/ mod_name_xx_yy_zz ---> mod/name/classes/xx_yy_zz.php
* 2/ \mod_name\xx_yy_zz ---> mod/name/classes/xx_yy_zz.php
* 3/ \mod_name\xx\yy_zz ---> mod/name/classes/xx/yy_zz.php
*
* @param string $classname
*/
public static function classloader($classname) {
Example of autoloadated class in forum module: Automatic class loading