To send data from frontend to backend, AJAX is used.
Data can be sent using GET or POST methods.
When using GET method, data is attached to the URL.
POST method is used to send secure or large data.
Data is sent using the body property.
Fetch sends the data silently to the PHP server.
This technique is used in login forms, registration forms, and data submission.
After completing this lesson, you can send data from JavaScript to PHP using AJAX.