Монтаж:
        1. Скачайте данный класс в нужное место,
        2. В данной строке класса необходимо ввести Api-key protected $apiKey = 'YOUR API KEY';
        3. Укажите этот класс в вашем проекте. Как:
        require('/path/Trackru/class.php');
$track = new Trackru;
$track = $track->getCarrierList();
                                $track = new Trackru;
$trackingNumber = 'RM121546236CN';
$track = $track->detectCarrier($trackingNumber);
                                $track = new Trackru;
$numbers = 'RG848383345CN,RM121546236CN';
$orders = '#123';
$page = 1;
$limit = 50;
$createdAtMin = time() - 7*24*60*60;
$createdAtMax = time();
$update_time_min = time() - 7*24*60*60;
$update_time_max = time();
$order_created_time_min = time() - 7*24*60*60;
$order_created_time_max = time();
$lang = 'en';
$track = $track->getTrackingsList($numbers,$orders,$page,$limit,$createdAtMin,$createdAtMax,$update_time_min,$update_time_max,$order_created_time_min,$order_created_time_max,$lang);
                                $track = new Trackru;
$extraInfo                         = array();
$extraInfo['title']                = 'iphone6';
$extraInfo['logistics_channel']   = '4PX挂号小包';
$extraInfo['customer_name']        = 'charse chen';
$extraInfo['customer_email']       = '[email protected]';
$extraInfo['order_id']             = '8988787987';
$extraInfo['customer_phone']       = '86 13873399982';
$extraInfo['order_create_time']    = '2018-05-11 12:00';
$extraInfo['destination_code']     = 'US';
$extraInfo['tracking_ship_date']   = time();
$extraInfo['tracking_postal_code'] = '13ES20';
$extraInfo['lang']                 = 'en';
$track = $track->createTracking('china-post','RM121516216CN',$extraInfo);
                                $track = new Trackru;
$items = array(
    array(
        'tracking_number' => 'RM131516216CN',
        'carrier_code'    => 'china-post',
        'title'          => 'iphone6',
        'logistics_channel' => '4PX挂号小包',
        'customer_name'   => 'charse chen',
        'customer_email'  => '[email protected]',
        'order_id'      => '8988787987',
        'customer_phone'      => '+86 13873399982',
        'order_create_time'      => '2018-05-11 12:00',
        'destination_code'      => 'US',
        'tracking_ship_date'      => time(),
        'tracking_postal_code'      => '13ES20',
        'lang'      => 'en'
    ),
    array(
        'tracking_number' => 'RM111516216CN',
        'carrier_code'    => 'china-post',
        'title'          => 'iphone6s',
        'logistics_channel' => '4PX挂号小包',
        'customer_name'   => 'clooney chen',
        'customer_email'  => '[email protected]',
        'order_id'      => '898874587',
        'customer_phone'      => '+86 13873399982',
        'order_create_time'      => '2018-05-11 12:00',
        'destination_code'      => 'US',
        'tracking_ship_date'      => time(),
        'tracking_postal_code'      => '13ES20',
        'lang'      => 'en'
    ),
);
$track = $track->createMultipleTracking($items);
                                $track = new Trackru;
$track = $track->getSingleTrackingResult('china-post','RM131516216CN','en');
                                $track = new Trackru;
$extraInfo['title']          = 'iphone6';
$extraInfo['logistics_channel'] = '4PX挂号小包';
$extraInfo['customer_name']  = 'charse chen';
$extraInfo['customer_email'] = '[email protected]';
$extraInfo['order_id']       = '8988787987';
$extraInfo['customer_phone'] = '+86 13873399982';
$extraInfo['destination_code'] = 'US';
$extraInfo['status']       = 7;
$track = $track->updateTrackingItem('china-post','RM131516216CN',$extraInfo);
                                $track = new Trackru;
$track = $track->deleteTrackingItem('china-post','RM131516216CN');
                                $track = new Trackru;
$extraInfo['destination_code']          = 'US';
$extraInfo['tracking_ship_date']  = '20180226';
$extraInfo['tracking_postal_code'] = '13ES20';
$extraInfo['specialNumberDestination']       = 'US';
$extraInfo['order']       = '#123123';
$extraInfo['order_create_time']       = '2017/8/27 16:51';
$extraInfo['lang']       = 'cn';
$track = $track->getRealtimeTrackingResults('china-ems','LW505109082CN',$extraInfo);