3v4l.org

run code in 500+ PHP versions simultaneously
<?php $old = ['row_id' => 1, 'user' => 'user1']; $new = ['row_id' => 1]; $diff = array_diff_assoc($new, $old); print_r($diff);
Output for 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( )

preferences:
57 ms | 699 KiB | 4 Q