Question

I am a JSON newbie, but have good experience in PHP and javascript. The question is simple, and the answer might be simpler. I am having trouble sending data from the PHP file on the server, to another PHP file that I have locally which would receive the data in JSON format from the server. What am I doing wrong?

Javascript Frag ( Local )

$(document).ready(function(){
//attach a jQuery live event to the button
$.getJSON('http://www.xpal.com/ws_users.php?action=get_user_data&user_id=33',function(data) {

        alert(data); //uncomment this for debug
        $('#showdata').html("<p>Username= "+data.username+"<br> Email= "+data.email+"<br> Firstname="+data.firstname+"<br> Lastname="+data.lastname+"</p>");
    });

});

PHP Frag (Server @xpal.com) :

$users=new users;

if($_GET['action']=="get_user_data")
{
$user_id=$_GET['user_id'];
$assoc=array(
                "username"=>$users->return_username($user_id),
                "email"=>$users->return_user_emailid($user_id),
                "firstname"=>$users->return_user_firstname($user_id),
                "lastname"=>$users->return_user_lastname($user_id)
            );
echo json_encode($assoc);
}   

Edit :

The error message : XMLHttpRequest cannot load xpal.com/ws_users.php?action=get_user_data&user_id=33. Origin localhost is not allowed by Access-Control-Allow-Origin.

Answer 1

To use jsonp, as other suggest, you must either put “callback=?” at the end of your URL, or use $.ajax() and specify the dataType is jsonp. Examples here.