3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1 = array(1, 2, 3); $a2 = array(2, 3, 4); array_merge($a1, $a2); print_r($a1); print_r($a2); $a1 = array_merge($a1, $a2); print_r($a1);

preferences:
65.56 ms | 402 KiB | 5 Q