AJAX Crossdomain please help

In the manual, it says this:

If you want AJAX requests to your server to work from any domain, or in preview, you can configure it to send the following HTTP header: Access-Control-Allow-Origin: *

Can somebody tell me where to put this line? I'm using the preview inside Construct 2 and I don't see any PHP file in the Construct 2 directory.

Please help!

Thank you

On the website you're trying to connect to, is my own humble guess.

On the website you're making the request to, make sure the following is the first thing printed:

header('Access-Control-Allow-Origin: *');

For Example (http://mywebsite.com/myfile.php):

<?php

header('Access-Control-Allow-Origin: *');

echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";

echo "<Catalog>\n\t";

echo "<data result=\"1\" reason=\"I like bacon\" />";

echo "\n</Catalog>";

?>

Thank you for that part but when you're previewing (testing) from within Construct 2 you don't have a web site and I don't have any php file.

Edit: I finally found a Google Chrome extension called Allow-Control-Allow-Origin: * and it's working good.

Have a look at the AJAX manual article that has a paragraph about cross domain in preview.