class classes{
// ...
	function get_classes(){
		$declared_classes = get_declared_classes();		
		$class_classes_id = array_search("classes",$declared_classes);
		foreach($declared_classes as $k => $v){
			if($k>$class_classes_id){
				$cms_declared_classes[] = $v;
			}
		}
		return $cms_declared_classes;
	}

	function get_objects(){
		$declared_classes = get_declared_classes();		
		$class_classes_id = array_search("classes",$declared_classes);
		foreach($declared_classes as $k => $v){
			if($k>$class_classes_id){
				$cms_declared_classes[] = $v;
			}
		}
		foreach($cms_declared_classes as $k => $v){
			if((object)$$v instanceof $v){
				$cms_objects[] = $v;
			}
		}
		return $cms_objects;
	}
}
$cms = new classes("vars,db,debug,files","vars,db,debug");
echo "классы:";
dump($cms->get_classes());
echo "объекты:";
dump($cms->get_objects());