3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Foo extends Exception { protected $file = ''; }
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Type of Foo::$file must be string (as in class Exception) in /in/eAZqC on line 3
Process exited with code 255.
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30
preferences:
91.28 ms | 402 KiB | 121 Q