3v4l.org

run code in 500+ PHP versions simultaneously
<?php class B { public function __toString() { return 'b'; } } class A { function getFoo(): ?string { return new B(); } } $a = new A(); var_dump($a->getFoo());
Output for 8.1.16 - 8.1.34, 8.2.12 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
string(1) "b"

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73.31 ms | 829 KiB | 4 Q