Online PHP editor | perf for 9uQuZ

@

<?php

$b = ['1' => 1, 'z' => 1];
$a = ['x' => 1, 'z' => 2];

if (count(array_diff(array_merge($a, $b), array_intersect($a, $b))) === 0) {
    echo 'the same';
} else {
    echo 'not the same';
}

eol versions