3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "73616c75742073616d75656c21"; $b = bin2hex($a); echo $b;
based on rVrUX
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
3733363136633735373432303733363136643735363536633231