3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $svctk_ym = ""; $svctk_d = 2; echo sprintf('%04s%02d', $svctk_ym, $svctk_d);
based on f8qYr
Output for 4.3.0 - 5.6.21, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
000002