3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface A { public function foo(string $q, ?array $params, bool $reference): bool; } class B implements A { public function foo(string $q, ?array $params = null, bool $reference = false): bool { return true; } } $class = new B(); var_dump($class->foo('bar'));
Output for 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
bool(true)

preferences:
62.02 ms | 406 KiB | 5 Q