计算地图上两点间的距离PHP类

柔光的暖阳◎ 2023-08-17 16:01 295阅读 0赞

计算地图上两点间的距离，使用的是谷歌地图

<?php
    class GeoHelper
    {
        /**
         * @param int $lat1
         * @param int $lon1
         * @param int $lat2
         * @param int $lon2
         * @param string $unit
         * @return
         */
        public static function distance($lat1, $lon1, $lat2, $lon2, $unit = "K")
        {
            $theta = $lon1 - $lon2;
            $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad
              ($lat2)) * cos(deg2rad($theta));
            $dist = acos($dist);
            $dist = rad2deg($dist);
            $miles = $dist * 60 * 1.1515;
            $unit = strtoupper($unit);
    
            if ($unit == "K") {
                return ($miles * 1.609344);
            } else
                if ($unit == "N") {
                    return ($miles * 0.8684);
                } else { //mi
                    return $miles;
                }
        }
    
        /**
         *
         * @param string $address
         * @param string $apikey
         * @return array [1]:lat [0]:lng
         */
        public static function getLatLng($address, $apikey)
        {
            $find = array("\\n", "\\r", " ");
            $replace = array("", "", "+");
            $address = str_replace($find, $replace, $address);
            $url = 'http://maps.google.com/maps/geo?q=' . $address . '&key=' . $apikey .
              '&sensor=false&output=xml&oe=utf8';
            $response = self::xml2array($url);
            $coordinates = $response['kml']['Response']['Placemark']['Point']['coordinates'];
            if (!empty($coordinates)) {
                $point_array = split(",", $coordinates);
                return $point_array;
            }
        }
    }

转载于:https://www.cnblogs.com/zxf100/p/11138908.html