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);
}