What is a postback with regards to websites/web development/programming?

• 20 September 2021
• in: Tutorials

A postback is that the term to refer to data that has been POSted back by the client to the server. For example once you submit data on an HTML form via your web browser (which is that the client here), once you submit that form, a postback to the server occurs. Effectively, with its HTTP request for the required file the web browser, will have the postback data. If you’ve got a PHP application, by exploitation the $_POST and $_GET superglobal variables (or $_REQUEST to refer to $_POST, $_GET and $_COOKIE in one), you’ll retrieve the postback data among your PHP applications.

A primary example of a postback may be a login or registration form– the postback data can comprises of the username and password, and the other information fields you need on either forms.