Personal Timer Web App with Authentication

This project is a secure PHP/MySQL web application that allows users to register, log in, and manage personalized timers. Each user can create multiple countdowns (e.g., deadlines, events, reminders), which are stored in a relational database and displayed in a responsive web interface.

Key features:

• Authentication system: register, login, and logout with session handling.

• Timers per user: each timer is tied to a specific account via foreign key relations.

• Schema-backed persistence: MySQL schema ensures referential integrity and automatic cleanup (cascade deletes on user removal).

• Responsive UI: timers dynamically update, giving a clear view of upcoming events.

• Navigation & state: shared navigation component (nav.php) and session-controlled access.

• Security best practices: password hashing and input validation.

This project demonstrates how to build a structured, database-driven web app in PHP, combining backend security, frontend usability, and relational data design.