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@ 2013-03-07T18:18:03Z

<?php
function foo(callable $bar) {
}

$r = new ReflectionFunction('foo');

foreach ($r->getParameters() as $param) {
    var_dump($param->isCallable());
}

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

42.25 ms | 402 KiB | 5 Q