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@ 2017-07-13T10:22:10Z

<?php declare(strict_types = 1);

function test(int $test)
{
    var_dump($test);
}

$var = null;
test($var);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

36.23 ms | 402 KiB | 5 Q