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@ 2014-04-11T16:10:07Z

<?php
$a = 1;
$b = 1;
unset($a);
$b = (unset)$b;

var_dump($a, $b);

Output
Performance
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References
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var_dump: documentation ( source)

preferences:dark modelive preview

42.95 ms | 402 KiB | 5 Q