function tel_dialstring ($str)
{
$str = tel_convert_vanity($str);
// International w/ Plus and Prefix
if (preg_match('/^\+[\d]{1,3}\s[\(\)\d\.a-z]+/i', $str))
{
return $str;
}
// US Domestic 10-Digit
elseif (preg_match('/^[\(]?[2-9]{1}[\d]{2}[\-\)\.\s]?[\da-z]{3}[\-\.\s]?[\da-z]{4}$/i', $str))
{
return '+1 '.preg_replace('/[^\da-z\+]/i', '', $str);
}
else
{
return preg_replace("/[^0-9]/", "", $str);
}
}
function us10digit ($str)
{
$str = tel_convert_vanity($str);
$str = preg_replace('/[^\d]/','', $str);
if (is_tel(substr($str,-10)))
{
return substr($str,-10);
}
else
{
$this->form_validation->set_message('us10digit', 'The %s field must contain a 10-digit US fax number.');
return false;
}
}
