Question

I wasn’t 100% how to phrase this question. I have a request to a URL similar to

example.php?miscData=JSON_FILE_NAME

Now JSON_FILE_NAME contains data unique to that file. I’ve got example.php set-up similar to below

    xmlHttpReq.open('GET', strURL, true);
    xmlHttpReq.onload = function(e) {
        var data = JSON.parse(this.response);
    }
    xmlHttpReq.send();

The request file has a function to handle the success of the call and is set up as below

function(retData, textStatus, xhr) { }

I expected retData would contain the JSON data {“name”:”Dominic”} etc… But it doesn’t. what am I doing wrong?

Answer 1

Your server side code from http://pastebin.com/c7h8V9JK is responding with an HTML page, not a JSON response. The code outside of your PHP is nothing but HTML. So naturally, when requesting the page, the server will return the HTML you’ve put outside of that php script.

Keep in mind, an AJAX request at its most basic is nothing special in terms of sending and receiving data from the server. Imagine that you have another tab open in your favorite tabbed browser, and that tab is navigating to the URL that your AJAX request is navigating to. That’s what’s going on when you make an AJAX request.

If you’re trying to get JSON data from example.php, begin by removing all of the HTML from that file and serialize the data that you’re trying to get using a JSON serializer.

encode json using php?