AJAX：将PHP数据存储在Javascript变量中

Question

As stated in the title, I have an ajax call. On the success function I want to store the returned data into a variable for use in my javascript. randNum.php simply returns a random number every 2 seconds, and I would like to use that number for other functions in my scripts. How can I use the data sent back from the php file in my javascript? I know there are more logical ways to go about this, but want to know how to accomplish the task this way.

    var result;
    var interval = 2000;
    function myCall() {
        var request = $.ajax({
            url: "randNum.php",
            type: "GET",            
            dataType: "html",
            success:function (msg) {
                result = msg;  //Not working as I intend
                setTimeout(myCall, interval);
            }
        });
    }

function(){
    do something with result;
}

Answer 1

Declare a Global variable outside of the function and assign response variable to it after the ajax response.

var results;
function TestJSONP(){
    $.ajax({
        url: "randNum.php",
        jsonp: "callback",
        dataType: "jsonp",

        success: function (response) {
            console.log(response);
            results = response;
        }
    });
}

Answer 2

You might not need to specify dataType , but use jqXHR.responseText to get the raw response. Something like

function myCall() {
    var request = $.ajax({
        url: "randNum.php",
        type: "GET",            
        success:function (data, textStatus, jqXHR) {
            result = jqXHR.responseText;  
            setTimeout(myCall, interval);
        }
    });
}

When you set dataType , and the response is not that type, then the ajax did not succeed and error call back will be invoked.