A simple user authentication system implemented using vanilla PHP only.
Simply clone / download this repository and run:
php -S localhost:4444
into the project folder. Now open http://localhost:4444 in a browser.
NOTE: I have used SQLite database to demonstrate this implementation. You have to have SQLite installed on your machine. Please visit https://sqlite.org/download.html to download SQLite for your machine.
If you have any questions, please open an issue. I will try my best to answer your questions.