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@ 2018-01-29T12:38:20Z

<?php

class A {
    public function b(A $a) {
        var_dump($a);
    }
}

$x = new A();
$y = null;
$x->b($y);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

36.63 ms | 402 KiB | 5 Q