3v4l.org

run code in 500+ PHP versions simultaneously
<?php class Foo { public function __construct() { echo "Side effect!\n"; } } const C = new Foo();
Output for 8.1.0 - 8.1.34, 8.2.22 - 8.2.31, 8.3.5 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
Side effect!
Output for 7.4.0 - 7.4.29, 8.0.1 - 8.0.19
Fatal error: Constant expression contains invalid operations in /in/MSWi0 on line 9
Process exited with code 255.
preferences:
66.35 ms | 973 KiB | 4 Q