Re: regex usage

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Valedol wrote:
> Is there a mothod to check string`s length with regex or the only way is
> using strlen?
> 
> I want string consisting of 4 digits
> and check string with this code:
> 
> if (preg_match("/\d{4}/",$_POST[id]))
> { echo $_POST[id]; }
> 
> but preg_match  returns true when string consists of 4 or more digits


preg_match("/^\d{4}$/",$_POST['id'])

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