The PHP array is sorted by a field

//$arrays the array to sort, $sort _key the name of the key to sort
functionMy_sort ($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;}

The PHP array is sorted by a field