Help me on this please I'm calling a PHP file using XmlhttpRequest but the browser is showing cross-Origin Request blocked: The Same Origin Policy disallows reading the remote resource at https://www.myurl.to (Reason: CORS header 'Access-Control-Allow-Origin' missing). but the resource 'https://www.myurl.to' is not what I am calling. I don't know why it is working like that.