I'd like to write a function that will take a string of characters and 
output it in a phone number format (xxx)xxx-xxxx and one for credit 
cards xxxx-xxxx-xxxx-xxxx. What I have below will currently remove 
non-numeric characters from the string, but I'm not sure how to do the 
rest of the formatting. Any help would be appreciated.

By the way, any recommendations for good php tutorials for beginners?



        function formatPhoneNum($prmValue)
        for($i=0; $i<strlen($prmValue); $i++)
        if(ereg('[0-9]', substr($prmValue, $i,1)))
        return $returnValue;
                $phoneNum= '415123kjdf4567';
        <p>Phone Number: <?=formatPhoneNum($phoneNum)?></p>

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