3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $ret = shell_exec('uname -r'); var_dump($ret);
Output for 5.6.28, 7.0.14 - 7.1.0
NULL
Output for 4.3.2 - 5.6.23, 7.0.0 - 7.0.9
Warning: shell_exec(): Unable to execute 'uname -r' in /in/Qp6L2 on line 3 bool(false)
Output for 4.3.0 - 4.3.1
Warning: shell_exec() [http://www.php.net/function.shell-exec]: Unable to execute 'uname -r' in /in/Qp6L2 on line 3 bool(false)