$source = $_GET['source'];

$query = MysqL_query("SELECT * FROM images WHERE big_thumb = '" . $source . "'");

$results = array();

while($row = MysqL_fetch_array($query))
{
   $results[] = array(
      'title' => $row['title'],'date' => $row['upload_date'],'time' => $row['upload_time']
   );
}

$json = json_encode($results);

echo $json;

这显示正常,继承人输出示例：

[{"title":"Torus","date":"2012-04-04","time":"23:06:14"}]

然后,当单击图像时,将调用此jquery：

var image_src = $(this).attr("alt"); // <= This works fine

    $.ajax({
        url: 'inc/get_image_details.PHP',data: {source : image_src},dataType: "json",success: function(data)
        {
            title = data.title;
            alert(title);

            date = data.date;
            alert(date);

            time = data.time;
            alert(time);
        }
    });

但是,(标题,日期和时间)变量在警告框中显示为“未定义”.
我已经尝试了多种实现ajax调用的方法,每次都会发生同样的事情.
这是我第一次尝试它,但我无法理解.