3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = "abcdefghijklmn"; $print = strrev($str); $st=""; $size = strlen($print); for($i = 0;$i<$size;$i=$i+2) { if($i < $size-1 ) $st .= substr($print,$i,$i+1); }echo $st;

preferences:
37.41 ms | 402 KiB | 5 Q