3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo exec('/bin/cat /var/log/lastlog');
Output for 5.5.24 - 5.6.28, 7.0.0 - 7.1.0
Output for hhvm-3.12.0
Failed to exec: `/bin/cat /var/log/lastlog'
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.2 - 5.4.45
Warning: exec(): Unable to fork [/bin/cat /var/log/lastlog] in /in/W6YNi on line 2
Output for 4.3.0 - 4.3.1
Warning: exec() [http://www.php.net/function.exec]: Unable to fork [/bin/cat /var/log/lastlog] in /in/W6YNi on line 2