3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo { public static function wtfphp() { echo "OK.\n"; } } $callable = 'foo::wtfphp'; call_user_func($callable); $callable();
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
OK. OK.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
OK. Fatal error: Call to undefined function foo::wtfphp() in /in/p0ZBE on line 13
Process exited with code 255.
preferences:
143.86 ms | 402 KiB | 183 Q