File: /storage/v12674/lcanova/public_html/wp-content/plugins/wp-google-maps/includes/class.distance.php
<?php
namespace WPGMZA;
if(!defined('ABSPATH'))
return;
class Distance
{
const UNITS_KM = "km";
const UNITS_MI = "mi";
const MILES_PER_KILOMETER = 0.621371;
const KILOMETERS_PER_MILE = 1.60934;
public static function between($a, $b)
{
if(!($a instanceof LatLng))
throw new \Exception('First argument is not an instance of WPGMZA\LatLng');
if(!($b instanceof LatLng))
throw new \Exception('Second argument is not an instance of WPGMZA\LatLng');
$lat1 = $a->lat;
$lon1 = $a->lng;
$lat2 = $b->lat;
$lon2 = $b->lng;
$dLat = deg2rad($lat2 - $lat1);
$dLon = deg2rad($lon2 - $lon1);
$a =
sin($dLat / 2) * sin($dLat / 2) +
cos(deg2rad($lat1)) * cos(deg2rad($lat2)) *
sin($dLon / 2) * sin($dLon / 2);
$c = 2 * atan2(sqrt($a), sqrt(1 - $a));
$d = 6371 * $c;
return $d;
}
}