3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(exec('cat /etc/httpd/httpd.conf'));
Output for 4.3.0 - 5.6.28, 7.0.0 - 7.1.0
string(0) ""
Output for hhvm-3.10.0 - 3.12.0
string(43) "Failed to exec: `cat /etc/httpd/httpd.conf'"