3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = array("a", "b", "c", "d"); echo serialize($data);
Output for 4.3.0 - 7.1.0
a:4:{i:0;s:1:"a";i:1;s:1:"b";i:2;s:1:"c";i:3;s:1:"d";}