如何在Ajax调用中访问变量集 [英] How to access a variable set within an Ajax call

问题描述

我想要一个函数调用通过Ajax一些PHP code内设置一个变量。问题是，该变量不能从函数外部访问，可以这么说。

I'm trying to set a variable within a function that calls some PHP code via Ajax. The problem is that the variable is not accessible from outside the function, so to say.

var startPageSelected = '';

function getSavedStartPage() {
    $.post(webroot + 'home/get_saved_startpage/',
    function(data){
        startPageSelected = $.parseJSON(data);
        alert(startPageSelected); //alert 1
    });
}

function something() {
    alert(startPageSelected); //alert 2
}

所以，当我打电话 getSavedStartPage 的警报1 中给了我正确的值，但是这就像以外的警报2 我的例子中，变量是空的。我想这事做的范围和/或异步AJAX的东西，但我无法弄清楚如何存储我的AJAX数据，而不是这样我可以从外部稍后访问。也许有人可以帮助我吗？

So when I call getSavedStartPage the "alert 1" gives me the correct value, but outside of this like "alert 2" in my example, the variable remains empty. I guess it has something to do with the scope and/or the asynchronous ajax stuff but I couldn't figure out how to store my ajax data instead so that I can access it from outside later on. Maybe someone can help me on that?

推荐答案

您可以通过您的retured数据作为参数传递给你的函数。

You can pass your retured data as a parameter to your function.

function getSavedStartPage() {
    $.post(webroot + 'home/get_saved_startpage/',
    function(data){
        startPageSelected = $.parseJSON(data);
        alert(startPageSelected); //alert 1
        something(startPageSelected);
    });
}

function something(data) {
    alert(data); //alert 2
}

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