3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types = 1); class A { function f(): string { return (string) (new A()); } function __toString() { return "5"; } } echo (new A())->f(); echo "\n\r"; echo ((new A())->f()) + "2";
Output for 7.1.25 - 7.1.27, 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 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
5 7

preferences:
101.63 ms | 407 KiB | 5 Q