3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo strtoupper($_GET['asd']);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0, 7.0.0 - 7.1.0
Notice: Undefined index: asd in /in/IilUH on line 3
Output for hhvm-3.12.0
Notice: Undefined index: asd in /in/IilUH on line 3 Warning: strtoupper() expects parameter 1 to be string, null given in /in/IilUH on line 3
Output for 4.3.0 - 5.2.17
Notice: Undefined index: asd in /in/IilUH on line 3