3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $data = str_pad($data['order_id'], 8, "0", STR_PAD_LEFT); echo $data;
Output for 5.5.0 - 7.1.0
Notice: Undefined variable: data in /in/dc2UL on line 2 00000000
Output for 4.3.0 - 5.4.45
00000000