3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1, 2, 3, 4, 5 ); $step = 2; function myfunc($value, $key) { global $step; if ($key == $step) echo '$ '; echo "$value "; } array_walk_recursive($a, 'myfunc');

preferences:
61.45 ms | 402 KiB | 5 Q