3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo "Your User Agent is :" . $_SERVER ['HTTP_USER_AGENT']; ?>
Output for 5.3.7 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: HTTP_USER_AGENT in /in/8PSOh on line 2 Your User Agent is :
Output for hhvm-3.10.0

Process exited with code 153.