3v4l.org

run code in 300+ PHP versions simultaneously
<?php $t1 = [3 => 21, 'test1' => 'test']; $t2 = [3 => 221, 'test1' => 'test2']; var_dump(array_merge($t1, $t2));

preferences:
51.34 ms | 402 KiB | 5 Q