3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo bin2hex(hash_hmac("sha256","a", "1", true));
based on VR1ND
Output for 5.3.19 - 7.2.0
c6e693d0b35805080632bc2469e1154a8d1072a86557778c27a01329630f8917