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@ 2014-05-07T09:17:37Z

<?php
$zero = '0';
var_dump(empty($zero));
$zerozero = '0.0';
var_dump(empty($zerozero));
$zerozeronull = NULL;
var_dump(empty($zerozeronull));

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

38.11 ms | 402 KiB | 5 Q