- Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<?php
$b = ['x' => 1, 'y' => 1];
$a = ['x' => 1, 'z' => 2];
if (count(array_diff(array_merge($a, $b), array_intersect($a, $b))) === 0) {
echo 'the same';
}