Description: ------------ The method factory should by static. A Framework with professional ambitions should by follow good patterns of design. And returning of the instance as a reference instead of value is another idea. Test script: --------------- interface CompanyComponent { public static function factory(); public function __destruct(); } interface UserExtension extends CompanyComponent { ... } class AuthUserExtension extends DB_DataObject implements UserExtension { ... public static function factory($param) { $inst = parent :: factory($param); ... return $inst; } ... } AuthUserExtension :: factory("somthing"); Expected result: ---------------- an instance of UserExtension Actual result: -------------- Fatal error: Cannot make non static method DB_DataObject::factory() static in class AuthUserExtension in /home/skr/svn_work_copy/groups/trunk/classes/AuthUserExtension.php on line 5

Welcome to PHP6 In PHP6 however, calling an instance method (not defined using `static`) as a class method (using `class::method()` ) will display an EWarning. Also note that in PHP6, calling a class method (defined using `static`) as an instance method (using `$instance->method()`) will ALSO display an EWarning