jQuery的AJAX错误处理 [英] jQuery AJAX error handling

问题描述

我已经搜查放在这里的问题，但我没有对如何使用错误处理jQuery的AJAX很好地理解（我是个菜鸟，所以它只是真的没有意义。）

I've searched the questions on here, but I don't have a good understanding of how to use the error handling in jQuery's AJAX (im a noob, so it just really doesn't make sense.)

有人能说说这是初学者？我目前发布的信息通过AJAX PHP脚本，但想要让jQuery的认识，如果从脚本返回的数据是错误或成功。

Can anybody describe this to a beginner? I'm currently posting information to a PHP script via AJAX, but want to allow jQuery to recognize if the returned data from the script is an error or success.

谢谢！ 戴夫

推荐答案

从Ajax调用返回的错误是返回从页面加载，这不是成功的结果。这可能是因为你的PHP页面会返回一个有效的网页，但结果是不是你想要的。这是withing成功返回处理。幸运地是，code的这段将有助于说明...

The error return from the ajax call is returning the results from a page load that was not successful. It may be that your php page returns a valid page, but with results that are not what you want. This is handled withing the success return. Hopefully the following code snippit will help illustrate...

$.ajax({
    type: "POST",
    url: "login.php",
    data: "action=login&user=" + user + "&pass=" + pass,
    success: function(xhr){
        if ((xhr == "Invalid Login") 
                || (xhr == "Invalid charaters in username.") 
                || (xhr == "Missing username or password.")
                || (xhr == "Unknown Error")) {
            $("#loginMessageContent").html(xhr);
        }
        else {
            simplemodalClose (dialog);
        }
   }, 
   error: function(xhr) {
       alert ("Oopsie: " + xhr.statusText);
   }
});

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