3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo foo;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Undefined constant "foo" in /in/pHWRi:2 Stack trace: #0 {main} thrown in /in/pHWRi on line 2
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Use of undefined constant foo - assumed 'foo' (this will throw an Error in a future version of PHP) in /in/pHWRi on line 2 foo
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.7, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.4, 5.3.29, 5.4.24 - 5.4.45, 5.5.8 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Use of undefined constant foo - assumed 'foo' in /in/pHWRi on line 2 foo

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