/*
use the following snippet to calculate distance between two addresses
requires the installation of the Delivery by Distance app by Zapiet
https://apps.shopify.com/delivery-rate-by-distance
*/

$DBD_STORENAME = 'xxx.myshopify.com';
$DBD_API_KEY = 'xxxxxx-xxxxxx-xxxxxx-xxxxxx-xxxxxx';

$dpd = new DBDAPI($DBD_STORENAME,$DBD_API_KEY);

$dpd->setOrigin($DATA['origin']['address1'],'',$DATA['origin']['city'],$DATA['origin']['province'],$DATA['origin']['postal_code'],$DATA['origin']['country']);
$dpd->setDestination($DATA['destination']['address1'],'',$DATA['destination']['city'],$DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country']);
$kilometers = $dpd->getDistance(); //distance returned is in meters