PHP 忒聊 綴豖 ヶ輛 is_subclass_of (PHP 4) Description This function returns TRUE if the object object, belongs to a class which is a subclass of class_name, FALSE otherwise. See also get_class(), get_parent_class() and is_a(). 綴豖 れ萸 ヶ輛 is_a 奻珨撰 method_exists