3v4l.org

run code in 300+ 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 - 8.2.30, 8.3.5 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
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:
54.26 ms | 945 KiB | 4 Q