3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $length = 8; substr(base_convert(md5(uniqid(rand(), true)), 16, 36), 1, $length);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0