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@ 2021-07-16T15:22:50Z

<?php

$f = function (X&Y $foo = null) {};

$r = new ReflectionParameter($f, 0);

var_dump($r->getType()->allowsNull());

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

74.05 ms | 476 KiB | 5 Q