3v4l.org

run code in 500+ PHP versions simultaneously
<?php class FOO { public function __toString(): string { return "hello world"; } } function bar(string $x): void { echo $x; } $foo = new FOO(); bar($foo);
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
hello world

preferences:
52.95 ms | 837 KiB | 4 Q