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@ 2018-06-14T16:29:01Z

<?php declare(strict_types=1);

const DEFAULT_VALUE = null;

function foo(bool $arg = DEFAULT_VALUE)
{
    var_dump($arg);
}


var_dump((new ReflectionFunction('foo'))->getParameters()[0]->allowsNull());

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

48.63 ms | 1390 KiB | 5 Q