3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $test = null; echo exec("ls .", $test); var_dump($test);
based on 2gH9n
Output for 4.3.0, 5.4.41 - 7.2.0
array(0) { }
Output for 4.3.1 - 5.4.40
array(0) { } sh: 1: ls: not found