John PHP John PHP - 2 months ago 6x
Javascript Question

using jsonp with ajax HTML

I have a simple html page that I open directly, file://abc.html

It has the following code

url: "http://localhost:8080/ajax_info.php",
dataType: "jsonp",
jsonp: 'jsoncallback',
success: function(data) {

ajax_info.php has echo 'hello' only in it.

On each reload the Network tab in chrome shows that a request is made to


and hello as a response is received but I dont get the alert box.

When I execute the page it shows nothing (no alert box), I am supposed to get alert with hello in it, Am I doing something wrong ?


Try adding this function to yours:

function jsoncallback(json){

EDIT: and when you want to use JSONP the server should echo params in the function you want:

do this on server

echo 'jsoncallback("hello!")';

or this:

echo 'jsoncallback('. json_encode($some_data) .')';

Of course 'jsoncallback' is the name of user function, that any user may want to change, so you have to do it right way:

echo $user_sent_me_this_name . '(' . json_encode($some_data) . ')';