3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php for ($i = 1; $i < 120; $i = ($i + $i)) { print str_pad($i, 3, '0', STR_PAD_LEFT) . "\n"; }
based on YADbT
Output for 4.3.0 - 7.1.0
001 002 004 008 016 032 064