Form Submit using Ajax in PHP

Welcome Developers, We will see what is AJAX in Hindi. Also, Form Submit using Ajax in PHP with JavaScript. we will also cover Country State City dropdown using ajax in PHP. What is AJAX? AJAX = Asynchronous JavaScript And XML. AJAX is not a programming language. AJAX just uses a combination of: A browser built-in XMLHttpRequest object (to request data from a web server) JavaScript and HTML DOM (to display or use the data) AJAX is a misleading name. AJAX applications might use XML to transport data, but it is equally common to transport data as plain text or JSON text. AJAX allows web pages to be updated asynchronously by exchanging data with a web server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page. AJAX is Based on Internet Standards AJAX is based on internet standards and uses a combination of: XMLHttpRequest object (to exchange data asynchronously with a server) JavaScript/DOM (to display/interact with the information) CSS (to style the data) XML (often used as the format for transferring data) AJAX applications are browser- and platform-independent! The XMLHttpRequest Object All modern browsers support the XMLHttpRequest object. The XMLHttpRequest object can be used to exchange data with a server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page. The XMLHttpRequest object is used to exchange data with a server. Send a Request To a Server To send a request to a server, we use the open() and send() methods of the XMLHttpRequest object: The onreadystatechange Property The readyState property holds the status of the XMLHttpRequest. The onreadystatechange property defines a function to be executed when the readyState changes. The status property and the statusText property holds the status of the XMLHttpRequest object. Property Description onreadystatechange Defines a function to be called when the readyState property changes readyState Holds the status of the XMLHttpRequest. 0: request not initialized 1: server connection established 2: request received 3: processing request 4: request finished and the response is ready status 200: "OK" 403: "Forbidden" 404: "Page not found" For a complete list go to the Http Messages Reference If you like this video plz LIKE SHARE and SUBSCRIBE my channel :)