javascript - How to obtain longitude and latitude through WeChat js and how to receive it in the background

wx.getLocation({

<code>    type: 'wgs84', // 默认为wgs84的gps坐标，如果要返回直接给openLocation用的火星坐标，可传入'gcj02'
    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 speed = res.speed; // 速度，以米/每秒计
        var accuracy = res.accuracy; // 位置精度
        
        $.ajax({
            url:"{:U('home/Share/index')}",
            data:{latitude:latitude,longitude:longitude},
            type:"POST",
            dataType:"json",
            success:function(){
                
            }
        })
    },
})</code>

When using ajax to transfer values ​​to the background controller, var_dump($_POST) is a null value. What’s going on?

Reply content:

wx.getLocation({

<code>    type: 'wgs84', // 默认为wgs84的gps坐标，如果要返回直接给openLocation用的火星坐标，可传入'gcj02'
    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 speed = res.speed; // 速度，以米/每秒计
        var accuracy = res.accuracy; // 位置精度
        
        $.ajax({
            url:"{:U('home/Share/index')}",
            data:{latitude:latitude,longitude:longitude},
            type:"POST",
            dataType:"json",
            success:function(){
                
            }
        })
    },
})</code>

When using ajax to transfer values ​​to the background controller, var_dump($_POST) is a null value. What’s going on?

The writing is correct. As for why you can’t get it, you need to debug your code yourself.

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Meat testing method:

Output the received data directly, and then accept the returned object in success.

<code>后台输出：
echo json_encode($_POST);exit();
前台输出：
success:function(msg){
        console.log(msg);    
       }</code>

ajax is an asynchronous request and cannot be output directly in the controller