How to Run Dynamic Website Source Code

Operation of traditional dynamic Web page: When the browser changes the selected item in the drop-down menu, clicks a button or performs any operation interacting with the Web server, it will generate an Http request and send the whole web page content to the web server. Even if this operation only needs data of one field, the browser will still send data of all fields to the web server. After receiving the data, the web server will perform the specified operation, and then send all the execution results back to the browser (including data, pictures, JavaScript, etc. There is no change at all).