3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $sAux = null; echo substr(md5($sAux), 4, 8);
based on 2YcrS
Output for 4.3.0 - 5.6.30, hhvm-3.10.1, 7.0.0 - 7.3.0rc3
8cd98f00
Output for hhvm-3.11.1 - 3.17.3
Warning: md5() expects parameter 1 to be string, null given in /in/lnHuL on line 4 Warning: substr() expects parameter 1 to be string, null given in /in/lnHuL on line 4