3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo substr(uniqid(), 0, 8);
Output for 5.0.0 - 7.1.7
52db5e76
Output for 4.3.0 - 4.4.9
Warning: uniqid() expects at least 1 parameter, 0 given in /in/VtEhl on line 3