PHP & MariaDB: Build the ULTIMATE Drag & Drop File Uploader Backend (AJAX/Fetch Guide)

This is the essential backend guide to complement our previous frontend tutorial!

Learn how to build a robust, secure, and modern PHP script to handle multiple file uploads sent via the Fetch API. We'll move beyond simple file saving and cover the critical server-side logic: file validation, secure storage on the server, and database management using MariaDB to track, replace, and delete files.

Mastering this backend architecture is key to building professional web applications.

In this tutorial, you'll learn:

How to correctly process data from the Fetch API using PHP's $_FILES.

Implementing server-side file security and validation.

Using MariaDB (MySQLi) to store file metadata.

The logic for file replacement and deletion.

Ready to code? Access the full article and source code now: https://ojambo.com/handle-ajax-multiple-file-upload-using-php-and-mariadb

Level up your PHP skills:

My Book: Learning PHP Programming: https://www.amazon.com/Learning-PHP-Programming-Edward-Ojambo-ebook/dp/B0D442PR8T

My Course: Learning PHP: https://ojamboshop.com/product/learning-php

Need one-on-one help or framework migration/updates? Contact me: https://ojambo.com/contact

#PHP #BackendDevelopment #AJAX #FetchAPI #MariaDB #FileHandling #CodingTutorial #WebDevelopment