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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'));

preferences:
23 ms | 404 KiB | 5 Q