경도와 위도를 사용하여 특정 범위 내에서 고객에게 가장 가까운 매장(예: 1,000미터 내에서 특정 매장에 가장 가까운 매장)을 확인하세요.

    //百度接口获取经纬度
    public function getlat($address) {
        $url = 'http://api.map.baidu.com/geocoder/v2/?city=上海&address=' . $address . '&output=json&ak=' . $this->ak;

        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
        $data = curl_exec($ch);
        curl_close($ch);
        $data = json_decode($data, true);
        $ret['lat'] = $data['result']['location']['lat'];
        $ret['lng'] = $data['result']['location']['lng'];
        echo json_encode($ret);
    }

    /*
     * 计算经纬度范围
     * $lat 纬度
     * $lon 经度
     * $raidus 半径(米)
     */

    function getAround($lat, $lon, $raidus) {
        $PI = 3.14159265;
        $EARTH_RADIUS = 6378137;
        $RAD = $PI / 180.0;

        $latitude = $lat;
        $longitude = $lon;
        $degree = (24901 * 1609) / 360.0;
        $raidusMile = $raidus;
        $dpmLat = 1 / $degree;
        $data = array();
        $radiusLat = $dpmLat * $raidusMile;
        $minLat = $latitude - $radiusLat;
        $maxLat = $latitude + $radiusLat;
        $data["maxLat"] = $maxLat;
        $data["minLat"] = $minLat;
        $mpdLng = $degree * cos($latitude * ($PI / 180));
        $dpmLng = 1 / $mpdLng;
        $radiusLng = $dpmLng * $raidusMile;
        $minLng = $longitude - $radiusLng;
        $maxLng = $longitude + $radiusLng;
        $data["maxLng"] = $maxLng;
        $data["minLng"] = $minLng;
        //print_r($data);
        return $data;
    }

    //计算出半径范围内的店
    public function getdz($lat, $lng) {
        include_once('my_db.php');
        $this->qu = new MY_DB_ALL("QUICK");
        //$ret = json_decode($this->getlat($address), true);
        //print_r($ret);exit;
        $data = $this->getAround($lat, $lng, 2000);
        //print_r($data);
        $sql = "select * from shop where baidu_lat between '" . $data['minLat'] . "' and '" . $data['maxLat'] . "' and baidu_lng between '" . $data['minLng'] . "' and '" . $data['maxLng'] . "' and status=1 and ztd_flag=2";
        $rett = $this->qu->rquery($sql);
        for ($i=0;$i<count($rett);$i++) {
            $array[$i]["shop_id"] = $rett[$i]["shop_id"];
            $array[$i]["shop_name"] = iconv("gbk","utf-8",$rett[$i]["shop_name"]);
            $array[$i]["shop_address"] = iconv("gbk","utf-8",$rett[$i]["shop_address"]);
            $array[$i]["shop_date"] = $rett[$i]["shop_date"];
            $array[$i][&#39;shop_phone&#39;] = $rett[$i]["shop_phone"];
            $array[$i][&#39;area&#39;] = $rett[$i]["area"];
        }
        //echo "<pre class="brush:php;toolbar:false">";print_r($array);exit;
        echo json_encode($array);
    }

    /**
     *  @desc 根据两点间的经纬度计算距离
     *  @param float $lat 纬度值
     *  @param float $lng 经度值
     */
    public function getDistance($lat1, $lng1, $lat2, $lng2) {
        $earthRadius = 6367000; //地球半径

        $lat1 = ($lat1 * pi() ) / 180;
        $lng1 = ($lng1 * pi() ) / 180;

        $lat2 = ($lat2 * pi() ) / 180;
        $lng2 = ($lng2 * pi() ) / 180;

        $calcLongitude = $lng2 - $lng1;
        $calcLatitude = $lat2 - $lat1;
        $stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
        $stepTwo = 2 * asin(min(1, sqrt($stepOne)));
        $calculatedDistance = $earthRadius * $stepTwo;

        return round($calculatedDistance);
    }

    //计算出最近的一家店
    public function zjd($address) {
        $ret = $this->getdz($address);
        $jwd = $this->getlat($address);
        if ($ret) {
            $arr = array();
            foreach ($ret as $k => $v) {
                $arr[$k] = $this->getDistance($jwd['lat'], $jwd['lng'], $v['baidu_lat'], $v['baidu_lng']);
            }
            asort($arr);
            //print_r($arr);
            foreach ($arr as $k1 => $v1) {
                $data[] = $ret[$k1];
            }
            print_r($data);
        } else {
            echo '无最近的门店';
        }
    }