3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $cl = `sub_string('clgt',1,2)`; echo $cl;
based on 0kn1Q
Output for 4.3.0, 5.4.42 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.10.0 - 3.12.0
Failed to exec: `sub_string('clgt',1,2)'
Output for 4.3.1 - 5.4.41
sh: 1: Syntax error: word unexpected (expecting ")")