nickcheek / USPSLookup

     * @param $zip

     * @return \SimpleXMLElement

     */

    public static function cityState(int $zip): object

    {

        $CityState = new \SimpleXMLElement("<CityStateLookupRequest></CityStateLookupRequest>");

        $CityState->addAttribute('USERID', self::$USPSuser);

        $ZipCode = $CityState->addChild('ZipCode');

        $ZipCode->addAttribute('ID', '0');

        $ZipCode->addChild('Zip5',$zip);

        $url = self::$service . 'CityStateLookup&XML=' . $CityState->asXML();

        return simplexml_load_file($url);

    }

    /**

     * Mulitple city and state lookup

     * @param $trackingnumber

     * @return \SimpleXMLElement

     */

    public static function track(string $trackingnumber): object

    {

        $track = new \SimpleXMLElement("<TrackRequest></TrackRequest>");

        $track->addAttribute('USERID', self::$USPSuser);

        $pack = $track->addChild('TrackID');

        $pack->addAttribute('ID', $trackingnumber);

        $url = self::$service . 'TrackV2&XML=' . $track->asXML();

        return simplexml_load_file($url);

    }

    /**

     * Tracking more than one package by USPS Tracking number array

     * @param $trackingarray (Array)

     * @return \SimpleXMLElement

     */

    public static function trackMultiple(array $trackingarray): object

    {

        $track = new \SimpleXMLElement("<TrackRequest></TrackRequest>");

        $track->addAttribute('USERID', self::$USPSuser);

        foreach($trackingarray as $trackingnumber){

            $pack = $track->addChild('TrackID');

            $pack->addAttribute('ID', $trackingnumber);

        }

        $url = self::$service . 'TrackV2&XML=' . $track->asXML();

        return simplexml_load_file($url);

    }

}