3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo "foo {$_SERVER['QUERY_STRING']}";
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: QUERY_STRING in /in/g6iev on line 2 foo
Output for hhvm-3.10.0
Notice: Undefined index: QUERY_STRING in /in/g6iev on line 21 foo
Output for 4.3.0 - 5.2.17
Notice: Undefined index: QUERY_STRING in /in/g6iev on line 2 foo