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@ 2014-05-16T09:47:42Z

<?php
$res = array();
$btn = "17/08/2014";
preg_match("/^(0[1-9]|[1-2][0-9]|3[0-1])\/(0[1-9]|1[0-2])\/[0-9]{4}$/",$btn,$res);
var_dump($res);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive preview

51.56 ms | 402 KiB | 5 Q