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@ 2016-01-01T12:29:40Z

<?php declare(strict_types=1);

function foo(string $foo = null, array $bar)
{
    var_dump($foo, $bar);
}

foo(null, [123]);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

40.62 ms | 402 KiB | 5 Q