3v4l.org

run code in 500+ PHP versions simultaneously
<?php class X { public $len = strlen('foo'); }
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.5
Fatal error: Constant expression contains invalid operations in /in/08SOl on line 4
Process exited with code 255.
preferences:
32.56 ms | 1151 KiB | 6 Q