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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo $_SERVER["HTTP_USER_AGENT"];
Output for 5.3.0 - 7.1.0
Notice: Undefined index: HTTP_USER_AGENT in /in/ZBMsQ on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: HTTP_USER_AGENT in /in/ZBMsQ on line 3