为什么返回的数据没有得到正确的警告？

Question

我在向服务器上的php脚本发送Ajax POST请求，然后服务器以JSON格式返回数据。但当我试图alert结果时，我会得到以下错误：Uncaught SyntaxError: unexpected token {——两次。

这里是我的Ajax调用：

var articles = $.post("process/get_articles.php");
    articles.done(function(data){
        var result = $.parseJSON(data);
        alert(result);
    });

我的服务器端代码：

while($query->fetch()){
    $result = array("ID"=>$Art_number, "Article"=>$Article, "Image"=>$Image_link);
    $result = json_encode($result);
    echo $result;
}

返回以下内容：

{"ID":1,"Article":"Article 1","Image":"http:\/\/wwww.mydomain.com\/images\/img.jpg"}{"ID":2,"Article":"Article2","Image":""}{"ID":3,"Article":"Article 3","Image":""}

为什么返回的数据没有得到正确的警告？任何帮助都将不胜感激！

Answer 1

Your code is spitting out successive JSON objects back-to-back. The result, overall, is not valid JSON.

Put your arrays in an enclosing single array and then JSON-encode that as the response. That'll result in the client getting an array of objects, which will be valid.