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@ 2014-09-27T15:15:33Z

<?php
var_dump((int) '4abc4');
$a = (int) 'abc';
$a = -$a;

var_dump($a);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

52.34 ms | 402 KiB | 5 Q