Return all registered __autoload() functions spl_autoload_extensions spl_autoload_register SPL Functions PHP Manual spl_autoload_functions (PHP 5 >= 5.1.2)spl_autoload_functions — Return all registered __autoload() functions Description array spl_autoload_functions ( void ) Get all registered __autoload() functions. Parameters This function has no parameters. Return Values An array of all registered __autoload functions. If the autoload stack is not activated then the return value is FALSE. If no function is registered the return value will be an empty array. spl_autoload_extensions spl_autoload_register SPL Functions PHP Manual