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@ 2013-07-16T16:46:26Z

<?php

var_dump(isset($someVar));

$anotherVar = null;
var_dump(isset($anotherVar));

$thirdVar = false;
var_dump(isset($thirdVar));

Output
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var_dump: documentation ( source)

preferences:dark modelive preview

36.58 ms | 402 KiB | 5 Q