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@ 2016-01-12T17:16:13Z

<?php

declare(strict_types=1);

class Foo {};

function takesFoo(Foo $foo = null) {
    var_dump($foo);
}

takesFoo(new Foo);
takesFoo();
takesFoo(null);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive preview

54.77 ms | 402 KiB | 5 Q