3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array('a','b'); $b = array('c','d'); $c = array_merge($a,$b); echo $c; $d = array(0=>'e',1=>'f'); $c = array_merge($c,$d); echo $c;

preferences:
58.07 ms | 402 KiB | 5 Q