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@ 2015-09-25T15:54:05Z

<?php
var_dump(
 (unset) 'x',
 (unset) 42,
 (unset) 0.42,
 (unset) [42],
 (unset) new StdClass,
 (unset) null
);
$a = "1";
(unset)$a;
var_dump($a);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

59.45 ms | 402 KiB | 5 Q