Snippit: PHP: Format 10 or 7 digit phone number

gistfile1.php

<?php
/* formats a 10 or 7 digit phone number (number only) by adding dashes at the appropriate locations */

function phoneFormat($number) {
	if(ctype_digit($number) && strlen($number) == 10) {
  	$number = substr($number, 0, 3) .'-'. substr($number, 3, 3) .'-'. substr($number, 6);
	} else {
		if(ctype_digit($number) && strlen($number) == 7) {
			$number = substr($number, 0, 3) .'-'. substr($number, 3, 4);
		}
	}
	return $number;
}
?>