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Create phone number format in php standard format

I found this resource on the usual formatting of user phone numbers .... http://www.eyesis.ca/projects/formatphone.html

I was wondering if someone else might have a better solution.

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function formatPhone($string)
{
    $number = trim(preg_replace('#[^0-9]#s', '', $string));

    $length = strlen($number);
    if($length == 7) {
        $regex = '/([0-9]{1})([0-9]{3})([0-9]{3})([0-9]{4})/';
        $replace = '$1-$2';
    } elseif($length == 10) {
        $regex = '/([0-9]{3})([0-9]{3})([0-9]{4})/';
        $replace = '($1) $2-$3';
    } elseif($length == 11) {
        $regex = '/([0-9]{1})([0-9]{3})([0-9]{3})([0-9]{4})/';
        $replace = '$1 ($2) $3-$4';
    }

    $formatted = preg_replace($regex, $replace, $number);

    return $formatted;
}


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They tried to get this one in Zend_Framework for a while, but for some reason it didn't do the 1.10 cut.

Personally, unless you have a very good, well-installed library for checking input types (PHP doesn't exist yet), I try to clean up the line as much as possible.



For phone numbers, I would just trim the spaces and come up with a pretty simple regex to try and keep things universal (replace "." With "-", etc.).

Keep in mind that when something better comes along, you probably want to rewrite the logic inside this method to take advantage of it!

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