Question

I call a php function using jquery

$.get("tableau_trusted.php",{username:$("#username").val(),password:$("#password").val()},function(data){
                    alert(data);
            });

Why do I return the result from the php file like this:

 echo "http://$server/trusted/$ticket/$view_url?$params";

Instead of:

 return "http://$server/trusted/$ticket/$view_url?$params";

I know I should use POST with the password, I’m just playing around for now.

Thanks!

Answer 1

Because Javascript and PHP can only communicate via HTTP. The PHP script receives an HTTP request, which is just a bunch of text. It sends back a reply, which is also just a bunch of text. The way to output this bunch of text is by echoing it to the standard output. An AJAX request/response is exactly the same as any other normal webpage you’d write using PHP.