3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $key = md5("i"); $i = 0; $str = ""; while ($i < strlen($key)) { if (strpos($str, $key[$i]) === false) { $str .= $key[$i]; } $i++; } echo $str;
Output for 4.3.0 - 5.6.21, hhvm-3.12.0, 7.0.0 - 7.1.0
865c0b4ae371
Output for hhvm-3.10.0

Process exited with code 153.