1. ??? ?? ?? ??? ??

???? ??? ?? ? ???? ??? ??? ????

??? ??:

<xml>
<ToUserName><![CDATA[gh_680bdefc8c5d]]></ToUserName>
<FromUserName><![CDATA[oIDrpjqASyTPnxRmpS9O_ruZGsfk]]></FLACFromUserName>
<CreateTime>1359036619</CreateTime>
<MsgType><![CDATA[location]]></MsgType>
<Location_X>22.539968</Location_X>
<Location_Y>113.954980</Location_Y>
<Scale>16</Scale>
<Label><![CDATA[中國(guó)廣東省深圳市南山區(qū)華僑城深南大道9789號(hào) 郵政編碼: 518057]]></Label>
<MsgId>5837017832671832047</MsgId>
</xml>

XML ?? ??

ToUserName 消息接收方微信號(hào)，一般為公眾平臺(tái)賬號(hào)微信號(hào)
 FromUserName 消息發(fā)送方微信號(hào)
 CreateTime 消息創(chuàng)建時(shí)間
 MsgType 消息類型，地理位置為location
 Location_X 地理位置緯度
 Location_Y 地理位置經(jīng)度
 Scale 地圖縮放大小
 Label 地理位置信息
 MsgId 消息ID號(hào)

2. ?? ?? ?? ??

Baidu Map Place API? ??? HTTP ????????. ?? ??? ?? ??? POI ???? ?? ? ???? ?? POI? ?? ?? ?? ???? ???? ?? ???? C#, C++, Java ? ?? ?? ??? ???? HTTP ??? ??? json, xml? ?? ? ????. ???.

Place API? ?? ?? POI ???, POI ?? ???, ?? ?? ?? ?? ???, ??? ?? ?? ?? ?? ???? ?????. ?? ?? POI ???? ?? ? ??, ???? ??, ?? ?? ??? ? ?? ?? ?? ??? ?????.

?? ?? ??? ???? ?? ?? ??? ???? ????.

?? ?? ?? POI ??? ?????? ??? ????.

http://api.map.baidu.com/place/v2/search

調(diào)用舉例如下：

http://api.map.baidu.com/place/v2/search?ak=MgBALVVeCd8THVBi6gPdvsvG&output=json&query=%E9%93%B6%E8%A1%8C&page_size=5&page_num=0&scope=2&location=39.915,116.404&radius=2000&filter=sort_name:distance

三、程序?qū)崿F(xiàn)

百度地圖類定義如下

class baiduMapClient
{    
    private $api_server_url;
    private $auth_params;

    public function __construct()
    {
        $this->api_server_url = "http://api.map.baidu.com/";
        $this->auth_params = array();
           $this->auth_params['key'] = "401f9a693dd267dd9a4661ec0895fb20";
        $this->auth_params['output'] = "json";
    }

    public function Geocoding_coordinate_address($location) 
    {   
        return $this->call("geocoder", array("location" => $location));
    }
    
    //http://api.map.baidu.com/place/search?&query=眼鏡&location=39.915,116.404&radius=3000&output=json&key=37492c0ee6f924cb5e934fa08c6b1676
    public function Place_search($query, $location, $radius) 
    {
        return $this->call("place/search", array("query" => $query, "location" => $location, "radius" => $radius));
    }
    
    protected function call($method, $params = array())
    {
        $headers = array(
            "User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:14.0) Gecko/20100101 Firefox/14.0.1",
            "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
            "Accept-Language: en-us,en;q=0.5",
            //"Accept-Encoding: gzip, deflate",
            "Referer: http://developer.baidu.com/"
        );
        $params = array_merge($this->auth_params, $params);
        $url = $this->api_server_url . "$method?".http_build_query($params);
        if (DEBUG_MODE){echo "REQUEST: $url" . "\n";}
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        //curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
         $data = curl_exec($ch);
        curl_close($ch);    
        $result = null;
        if (!empty($data)){
            if (DEBUG_MODE){
                echo "RETURN: " . $data . "\n";
            }
            $result = json_decode($data);
        }
        else{
            echo "cURL Error:". curl_error($ch);
        }
        return $result;
    }
}

獲取附近的調(diào)用代碼如下：

function catchEntitiesFromLocation($entity, $x, $y, $radius)
{   
    $mapObj = new baiduMapClient();
    $search = $mapObj->Place_search($entity, $x.",".$y, $radius);
    $results = $search->results;
    for ($i = 0; $i < count($results); $i++) {
        $distance = getDistance($x, $y, $results[$i]->location->lat, $results[$i]->location->lng);
        $shopSortArrays[$distance] = array(
            "Title"=>"【".$results[$i]->name."】<".$distance."M>".$results[$i]->address.(isset($results[$i]->telephone)?" ".$results[$i]->telephone:""),
            "Description"=>"", 
            "PicUrl"=>"", 
            "Url"=>"");
    }
    ksort($shopSortArrays);//排序
    $shopArray = array(); 
    foreach ($shopSortArrays as $key => $value) {  
        $shopArray[] =  array(
                        "title" => $value["Title"],
                        "description" => $value["Description"],
                        "pic" => $value["PicUrl"],
                        "url" => $value["Url"],
                    );
        if (count($shopArray) > 6){break;}
    }
    return $shopArray;
}

計(jì)算兩坐標(biāo)之間距離如下

function getDistance($lat_a, $lng_a, $lat_b, $lng_b) {
    //R是地球半徑（米）
    $R = 6366000;
    $pk = doubleval(180 / 3.14169);
    
    $a1 = doubleval($lat_a / $pk);
    $a2 = doubleval($lng_a / $pk);
    $b1 = doubleval($lat_b / $pk);
    $b2 = doubleval($lng_b / $pk);

    $t1 = doubleval(cos($a1) * cos($a2) * cos($b1) * cos($b2));
    $t2 = doubleval(cos($a1) * sin($a2) * cos($b1) * sin($b2));
    $t3 = doubleval(sin($a1) * sin($b1));
    $tt = doubleval(acos($t1 + $t2 + $t3));

    return round($R * $tt);
}

對(duì)于用戶的坐標(biāo)記錄，我們使用數(shù)據(jù)庫(kù)的方式來存儲(chǔ)，

如果用戶發(fā)送查詢命令，則直接查詢，

function searchUserLocation($userWxid)
{
    Global $mysql_host;
    Global $mysql_host_s;
    Global $mysql_port;
    Global $mysql_user;
    Global $mysql_password;
    Global $mysql_database;
    
    //查詢使用從庫(kù)，支持SAE
    $mysql_table = "location";
    $mysql_state = "SELECT * FROM ".$mysql_table." WHERE userWxid = \"".$userWxid."\"";
    $con = mysql_connect($mysql_host.':'.$mysql_port, $mysql_user, $mysql_password);
    if (!$con){
        die('Could not connect: ' . mysql_error());
    }
    mysql_query("SET NAMES 'UTF8'");
    mysql_select_db($mysql_database, $con);
    $result = mysql_query($mysql_state);
    $location = array(); 
    while($row = mysql_fetch_array($result))
    {
        $location["x"] = $row["locationX"]; 
        $location["y"] = $row["locationY"]; 
    }
    mysql_close($con);
    if (isset($location["x"]) && $location["x"] != 0.0){
        return $location;
    }else{
        return "系統(tǒng)中沒有你的地理位置信息，請(qǐng)先發(fā)送位置給我！您不用擔(dān)心你的行蹤被泄漏，因?yàn)槟憧梢曰瑒?dòng)地圖，把別處的地址發(fā)送過來。";
    }
    
}

如果用戶發(fā)了位置，則進(jìn)行更新

function updateOrInsert($weixinid, $locationX, $locationY)
{    
    if (isset($_SERVER['HTTP_APPNAME'])){
        $mysql_host = SAE_MYSQL_HOST_M;
        $mysql_host_s = SAE_MYSQL_HOST_S;  //sae的從庫(kù)
        $mysql_port = SAE_MYSQL_PORT;
        $mysql_user = SAE_MYSQL_USER;
        $mysql_password = SAE_MYSQL_PASS;
        $mysql_database = SAE_MYSQL_DB;
    }else{
        $mysql_host = "127.0.0.1";
        $mysql_host_s = "127.0.0.1";
        $mysql_port = "3306";
        $mysql_user = "root";
        $mysql_password = "root";
        $mysql_database = "sae";
    }
    
    $mysql_table = "location";
    //INSERT INTO location VALUES("23s2s", 1122.2, 366.2) ON DUPLICATE KEY UPDATE locationX = 1122.2, locationY = 366.2;
    
    $mysql_state = "INSERT INTO ".$mysql_table." VALUES(\"".$weixinid."\", ".$locationX.", ".$locationY.") ON DUPLICATE KEY UPDATE locationX = ".$locationX.", locationY = ".$locationY.";";
    var_dump($mysql_state);
    //
    
    $con = mysql_connect($mysql_host.':'.$mysql_port, $mysql_user, $mysql_password);
    if (!$con){
        die('Could not connect: ' . mysql_error());
    }
    mysql_query("SET NAMES 'UTF8'");
    mysql_select_db($mysql_database, $con);
    $result = mysql_query($mysql_state);
    if ($result == true){
        //return "你提交的位置為緯度:".$locationX."，經(jīng)度:".$locationY."。\n現(xiàn)在可以發(fā)送“附近”加關(guān)鍵字的命令查詢附近的目標(biāo)，如“附近酒店”，“附近醫(yī)院”。";
        return "已經(jīng)成功獲取你的位置。您不用擔(dān)心你的行蹤被泄漏，因?yàn)槟憧梢园亚Ю镏獾牡刂诽峤贿^來。\n現(xiàn)在可以發(fā)送“附近”加關(guān)鍵字的命令查詢附近的目標(biāo)，如“附近酒店”，“附近醫(yī)院”。";
    }else{
        return "提交失敗，請(qǐng)重試。如果一直出現(xiàn)這樣的錯(cuò)誤，請(qǐng)給我們留言。";
    }
}

對(duì)于用戶發(fā)送的內(nèi)容，先提取坐標(biāo)，然后進(jìn)行組合查詢

實(shí)現(xiàn)效果如下：

?

?

? ??? ?? ??? ?? ??? ?? ??? ?? WeChat ?? ??? ??? ????? ?? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!