/**
* @param $newMobileNum
* @return null
* @throws Exception
* @internal param $db
*/
public static function validateMobileNumber($newMobileNum)
{
if (empty($newMobileNum) === true) {
return null;
// no mobilenumber
}
if (!preg_match('/^[0-9]{10}$/', $newMobileNum)) {
throw new Exception('Mobile number should contain only digits of total length 10');
}
if (UserFetcher::existsMobileNum($newMobileNum)) {
throw new Exception("Mobile entered number already exists in database.");
// the array of errors messages
}
return $newMobileNum;
}
