I have the class testClass which has the method save. This method saves object to a database. But it needs to serialize object before saving. How can I serialize object from within the class to do that?

class testClass {
    private $prop = 777;
    public function save() {
        $serializedObject = serialize(self);
        DB::insert('objects', array('id', 'object'))
                ->values(array(1, $serializedObject))
                ->execute();
    }
}

serialize(self) obviously doesn't work.