微信公众号根据粉丝当前位置匹配附近几公里范围的数据 代码整理

微信公众号根据粉丝当前位置匹配附近几公里范围的数据，首先微信公众号开启获取地理位置的接口权限。

1，Jssdk类包的引入Jssdk.class.php生成注册微信官方分享按钮的权限参数，上篇文章已经提过核心包文件直接从那复制即可，传送

2，前台页面的微信授权菜单，获取地理位置返回的数据：

<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
<script>
 wx.config({
        debug: false,
        appId: '{pigcms:$signPackage.appId}',
        timestamp: '{pigcms:$signPackage.timestamp}',
        nonceStr: '{pigcms:$signPackage.nonceStr}',
        signature: '{pigcms:$signPackage.signature}',
        jsApiList: [
            'checkJsApi',
            'onMenuShareTimeline',
            'onMenuShareAppMessage',
            'onMenuShareQQ',
            'onMenuShareWeibo',
            'getLocation',
            'hideMenuItems',
            'showMenuItems',
            'hideAllNonBaseMenuItem',
            'showAllNonBaseMenuItem',
            'openLocation',
            'chooseImage',
            'chooseWXPay',
            'previewImage'
            ]
      })

</script>

获取当前粉丝地理位置坐标：

<script>
wx.ready(function(){
    wx.getLocation({
        type: 'wgs84', 
        success: function (res) {
            var latitude = res.latitude;
            var longitude = res.longitude;
            var wecha_id = "{$wecha_id}";
            $.get("此处为处理坐标转换地图位置的php方法" , {"lat" : latitude , "lng" : longitude,"wecha_id":wecha_id} ,function(result){
                result = eval("("+result+")");
                if(result.status != 2){
                    if(result.status == 1){    
                        layer.open({type: 2,time: 2,success:function(){
                             location.reload();
                            }
                        });                
                    }else{
                        layer.open({
                            content: result.info,
                            style: 'background-color:rgba(51, 44, 43, 0.72); color:#fff; border:none;',
                            time: 2
                        });
                    }
                }
                
            });
        }
    });
});
</script>

3，php程序处理：

//默认页面数据调取
public function dataIndex() {
        
        $city = isset ( $this->city ) ? $this->city: '城市名';
        $pid = D ( 'area' )->where ( array ('name' => $city  ) )->getField ( 'id' );
        $type = isset ( $_GET ['type'] ) ? intval ( $_GET ['type'] ) : 1;
        $token = $this->_get('token');
        $wecha_id = $this->_get('wecha_id');
        $nearBy = 5000;
        $model = D('user_point');
        $pointInfo = $model->where(array('openid'=>$wecha_id))->field('lat,lng')->find();
        /* 坐标转换  */
        $pointInfo = self::pointChange($pointInfo['lat'], $pointInfo['lng']);
        switch ($type) {
            case '1' :
                /* 生成获取坐标的参数*/
                import("@.ORG.Jssdk");/*第一步提到的核心包*/
                $model = D("Wxuser");
                $wxInfo = $model->where(array('token' => $token))->find();
                $jssdk = new JSSDK($wxInfo['appid'], $wxInfo['appsecret']);
                $this->signPackage = $jssdk->GetSignPackage();                
                
                $list = D ( 'company' )->where ( array (
                        'token' => $token,
                        'isbranch' => 1,
                        'pid' => $pid 
                ) )->select ();
                
                break;
            
            case '2' :
                
                $list = D ( 'company' )->where ( array (
                        'token' => $this->token,
                        'isbranch' => 1,
                        'pid' => $pid 
                ) )->select ();
                break;
            
            case '3' :
                $catid = D ( 'dish_order' )->where ( array (
                        'wecha_id' => $this->wecha_id 
                ) )->getField ( 'catid', true );
                $list = D ( 'company' )->where ( array (
                        'token' => $this->token,
                        'isbranch' => 1,
                        'id' => array (
                                'in',
                                $catid 
                        ) 
                ) )->select ();
                break;
        }
        /* 附近距离 */
            
        foreach ($list as $key => $value) {
            $distance = self::getDistance_map($pointInfo['lat'], $pointInfo['lng'], $value['latitude'], $value['longitude']);
            if($type == 1){
                if($nearBy < $distance){
                    unset($list[$key]);
                }else{
                    $list[$key]['nearby'] = $distance/1000;
                }
            }else{
                $list[$key]['nearby'] = $distance/1000;
            }
            
        }
        
        
        $this->type = $type;
        $this->assign ( 'list', $list );
        $this->display ();
    }
    

    /* 附近 */
    /**
     * 计算当前商家位置是否在范围内
     * @param 当前位置经度 $lat_a
     * @param 计算经度 $lng_a
     * @param 当前位置维度 $lat_b
     * @param 计算纬度 $lng_b
     * @author bieanju
     * @return number 距离  */
    public function getDistance_map($lat_a, $lng_a, $lat_b, $lng_b) {
        //R是地球半径（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);
    }
    
    public function savePresonPoint(){
        $data['lat'] = $this->_get('lat');    
        $data['lng'] = $this->_get('lng');    
        $data['openid'] = $this->_get('wecha_id');
        $data['create_time'] = time();
        $pointLocationTime = 600;//10分钟重新定位
        $model = D('UserPoint');
        if(empty($data['openid'])){
            echo json_encode(array('status'=>0,'info'=>'网络异常请重新加载！'));
        }else{
            $pointInfo = $model->where(array("openid" => $data['openid']))->field('id,create_time')->find();
                if(!$pointInfo){                    
                    $model->add($data);
                    echo json_encode(array('status'=>1));
                }else{
                    if($pointInfo['create_time']-time() > $pointLocationTime){
                        if($model->where(array('id' => $pointInfo['id']))->save($data) !== false){
                            echo json_encode(array('status'=>1));
                        }                        
                    }else{
                        echo json_encode(array('status'=>2));
                    }
                }                
            
        }
            
    }    
    
    public function pointChange($x,$y){
        if (C ( 'baidu_map' )) {
            $transUrl = 'http://api.map.baidu.com/ag/coord/convert?from=2&to=4&x=' . $x . '&y=' . $y;
            $json = Http::fsockopenDownload ( $transUrl );
            if ($json == false) {
                $json = file_get_contents ( $transUrl );
            }
            $arr = json_decode ( $json, true );
            $x = base64_decode ( $arr ['x'] );
            $y = base64_decode ( $arr ['y'] );
        } else {
            $amap = new amap ();
            $lact = $amap->coordinateConvert ( $y, $x, 'gps' );
            $x = $lact ['latitude'];
            $y = $lact ['longitude'];
        }
        
        return array('lat'=>$x,'lng'=>$y);
    }