3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $i = 5; while ($i > 0): $power = 1; $bin = array(); if ($i / pow(2,$power) != 0) { $bin[$power - 1] = 1; $i = $i - pow(2,$power); } else $bin[$power - 1] = 0; print $bin[$power - 1]; $power++; endwhile; ?>
Output for 4.3.0 - 7.1.0
111