php - 无法运行 AJAX 请求

Question

我正在尝试通过 AJAX 调用在 php 文件中设置 session 变量。但我收到了未定义索引错误。

这是 jquery 代码:

$('.selectcpno li').click(function(){

            //Get the value
             var value = $(this).data("value");
            //Put the retrieved value into the hidden input
             $('input[name=cpnoselected]').val(value);


             $.ajax({
                type: "post",
                url: "../web/cpnoselected.php",
                dataType: "text",
                data:"{'cpno':'" +value+ "'}",
                success: function( data ){
                alert("hellosuccess");
                    document.getElementById("cpno").innerHTML=data;
               },
                error: function( jqXhr, textStatus, errorThrown ){
                alert(value);
                    console.log( errorThrown );
                    console.log( jqXhr );
                    console.log(textStatus);

                }
            });
        });

这是我在 php 文件中的内容:

<?php

 include("../config/config.php");
 include("../inc/functions.php");

 $cpnoselected=  $_POST['cpno'];
 $_SESSION['cpno']=$cpnoselected;
 echo $cpnoselected;
 ?>

当我运行它时，我在 C:/...../cpnoselected.php 中得到 undefined index :cpno

请帮忙解决

Answer 1

改变

data:"{'cpno':'" +value+ "'}",// it needs to be object not string

至

data:{'cpno':value}, //now its object