3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array(1,2,3,4,5,6,7,8,9); function walk($a, $index = 0){ if (count($a) == $index + 1) { echo($a[$index]); } else { echo($a[$index]); walk($a, $index + 1); } } walk($array);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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preferences:
314.99 ms | 406 KiB | 459 Q