3v4l.org

run code in 300+ PHP versions simultaneously
<?php if ($_GET[a]==3) { echo $b; } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Error: Undefined constant "a" in /in/8PlZX:2 Stack trace: #0 {main} thrown in /in/8PlZX on line 2
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/8PlZX on line 2 Notice: Undefined index: a in /in/8PlZX on line 2
Output for 7.3.32 - 7.3.33
Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/8PlZX on line 2
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
Notice: Use of undefined constant a - assumed 'a' in /in/8PlZX on line 2 Notice: Undefined index: a in /in/8PlZX on line 2

preferences:
251.41 ms | 402 KiB | 326 Q