/*
use the following snippet to geocode addresses and work out if an address is within a polygon or line of sight distances
requires your own Google Maps Platform API key
https://cloud.google.com/maps-platform/pricing
*/

$GOOGLE_API_KEY = 'xxxxxxxxxxxxxxxxxxxx';

$gg = new GoogleGeocodingAPI($GOOGLE_API_KEY);

$gg->setDestination($DATA['destination']['address1'],'',$DATA['destination']['city'],$DATA['destination']['province'],$DATA['destination']['postal_code'],$DATA['destination']['country']);
$customerLocation = $gg->getLocation();

//see if customer is within polygon
//format: [[lat,long],[lat,long],[lat,long]]
$polygon = [[38.1481562,-123.0240327],[38.4667462,-121.9805727],[37.6923902,-120.6537037],[36.9998603,-121.5998587],[37.5374152,-122.4660557]];
if (pointInPolygon([$customerLocation['lat'],$customerLocation['lng']],$polygon)) {
	//customer within polygon
} else {
	//customer outside polygon
}

//calculate distance between a co-ordinate and the customer
$point = ['lat'=>36.9998603,'lng'=>-121.5998587];
$d = $gg->getDistance($customerLocation,$point);
print_r($d);
/* sample output:
Array
(
    [meters] => 2517215.7349647
    [kilometers] => 2517.2157349647
    [feet] => 8258582.0719016
    [yards] => 2752859.8515619
    [miles] => 1564.1253423536
)
*/