Home > Article > Backend Development > Obtain location information through WeChat and save it to the server for use
First, add the WeChat configuration file to the page and obtain it through js.
<script type="text/javascript"> wx.config({ debug: false, appId: '{$signPackage.appId}', timestamp: '{$signPackage.timestamp}', nonceStr: '{$signPackage.nonceStr}', signature: '{$signPackage.signature}', jsApiList: [ // 所有要调用的 API 都要加到这个列表中 'checkJsApi', 'openLocation', 'getLocation', 'scanQRCode' ] }); wx.ready(function () { $('#scan').click(function(){ wx.scanQRCode({ needResult: 0, }); }); wx.checkJsApi({ jsApiList: [ 'getLocation' ], success: function (res) { if (res.checkResult.getLocation == false) { alert('你的微信版本太低,不支持微信JS接口,请升级到最新的微信版本!'); return; } } }); wx.getLocation({ success: function (res) { var latitude = res.latitude; // 纬度,浮点数,范围为90 ~ -90 var longitude = res.longitude; // 经度,浮点数,范围为180 ~ -180。 var geoconv = 'http://api.map.baidu.com/geoconv/v1/?callback=coordinateTransformation&coords=' + longitude + ',' + latitude + '&from=1&to=5&ak=5BFNbSgnVF5g2O72NpvTDxFm'; var script = document.createElement('script'); script.src = geoconv; document.head.appendChild(script); }, cancel: function (res) { alert('用户拒绝授权获取地理位置'); } }); }); function coordinateTransformation(data) { var LATLNG = data.result[0].y + ',' + data.result[0].x; var url = 'http://api.map.baidu.com/geocoder/v2/?callback=getCurrentLocation&ak=5BFNbSgnVF5g2O72NpvTDxFm&location=' + LATLNG + '&output=json&pois=1'; var script = document.createElement('script'); script.src = url; document.head.appendChild(script); } function getCurrentLocation(data) { if(data.status === 0) { var address = data.result.formatted_address, x = data.result.location.lng, y = data.result.location.lat, city = data.result.addressComponent.city, street = data.result.addressComponent.street || data.result.formatted_address, reqData = 'street=' + address + '&name=' + street + '&lng=' + x + '&lat=' + y + '&city=' + city; var url = "{:U('Index/savePosition')}"; $.getJSON(url,{'name':street,'lng':x,'lat': y,'city':city},function(data) { if(data.returnCode) { } }); } } </script>
Secondly, receive the geographical coordinates passed by ajax in the controller, and then save them to the session.
public function savePosition() { $city = II('get.city','','trim'); $addr = II('get.name','','trim'); $lng = II('get.lng','','trim'); $lat = II('get.lat','','trim'); $myLocation = array( 'city' =>$city, 'addr' =>$addr, 'lng' =>$lng, 'lat' =>$lat, ); $_SESSION['MyLocation'] = $myLocation; $data['returnCode'] = 1; $data['returnInfo'] = '获取位置成功!'; $this->ajaxReturn($data); return; }
Note: The thinkphp framework is used. II is a custom method to obtain the value passed by get or post, the same as the I function.
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