3v4l.org

run code in 300+ PHP versions simultaneously
<?php class X { static $c = 'Y'; public static function go() { static::$c::test(); } } class Y { public static function test() { echo 'Hello World!'; } } X::go();
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.32, 8.2.0 - 8.2.28, 8.3.0 - 8.3.22, 8.4.1 - 8.4.8
Hello World!
Output for 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '::' (T_PAAMAYIM_NEKUDOTAYIM) in /in/qhv3h on line 6
Process exited with code 255.
preferences:
129.43 ms | 407 KiB | 5 Q