PHP - Check if two arrays are equal

<?php // items from db $array[] = [10, 20, 10]; $array[] = [10, 20, 201]; $array[] = [10, 20, 501]; $array[] = [10, 20, 601]; // new items $arrayb[] = [10, 20, 10]; $arrayb[] = [10, 20, 20]; $arrayb[] = [10, 20, 50]; $arrayb[] = [10, 20, 60]; function compare(&$array,&$arrayb) {     foreach ($array as $k => $v) {         foreach ($arrayb as $k2 => $v2) {             if($v == $v2) {                             unset($array[$k],$arrayb[$k2]); // removed matched items             }         }     } } compare($array,$arrayb); // delete all print_r($array); echo '============'; // insert all print_r($arrayb);