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@ 2013-10-06T21:26:04Z

<?php
$a = 'bb';
if (!preg_match('/[0-9\-\,]+/', $a)) {
    die('Invalid Request');
}

Output
Performance
VLD
References
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preg_match: documentation ( source)

preferences:dark modelive preview

41.39 ms | 402 KiB | 5 Q