jQuery, JSON and Apache problem

Question

I have an jQuery JSON request, that loads some JSON from another server (ex. foo.com):

$.getJSON(\"http://foo.com/json.php\",function(data) { alert(data); });


        

Answer 1

I'm pretty sure that in order to do cross domain calls like this you have to have a callback, it's what's needed to do JSONP.

here is some more info on jsonp http://www.insideria.com/2009/03/what-in-the-heck-is-jsonp-and.html

For jsonp to work you have to have a callback for the server to wrap the json string in. for example:

$.getJSON("http://foo.com/json.php?callback=?", function(data){});

here a callback function is generated by jquery and passed into the request, so it would be something like:

http://foo.com/json.php?callback=generatedFunction

then what's returned by the server should be:

generatedFunction("{key:value, key2:value2}");

where the parameter in that function is the actual json string.

in the php to return this it would be something like:

$callback = $_GET['callback'];
print($callback."(".json_encode($theobject).");");

Answer 2

More about cross-domain JSON throw JSONP and jQuery.