function my_sort($arrays,$sort_key,$sort_order=SORT_DESC,$sort_type=SORT_NUMERIC ){  

        if(is_array($arrays)){  

            foreach ($arrays as $array){  

                if(is_array($array)){  

                    $key_arrays[] = $array[$sort_key];  

                }else{  

                    return false;  

                }  

            }  

        }else{  

            return false;  

        }

        array_multisort($key_arrays,$sort_order,$sort_type,$arrays);  

        return $arrays;  

    }