3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $b = array(2, 3); $arr = array(&$a, &$b[0], &$b[1]); $arr[1]++; $arr=1+$arr[0]++; echo $a; echo implode($b); ?>

preferences:
39.09 ms | 402 KiB | 5 Q