3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = array(1, 2, 3, 4, 5 ); $step = 2; function myfunc($key, $value) { global $step; if ($key == $step) echo '$ '; echo "$value "; } array_walk($a, 'myfunc');
Output for 4.3.0 - 7.2.0
0 $ 1 2 3 4