Professional Invoice Generator & Management System

I developed a modern, full-stack invoice management application using PHP 8 and MySQL, designed to help freelancers and small businesses automate billing, track payments, and manage client data efficiently.

💻 Dynamic Invoice Automation

• Built a responsive invoice creation engine supporting dynamic itemization, tax rates, and discount calculations.
• Integrated automated PDF generation allowing users to instantly download and print professional invoices directly from the dashboard.
• Streamlined the billing lifecycle with status tracking (Draft, Sent, Paid, Overdue), enabling users to manage cash flow effectively.

🔐 Secure Authentication & User Security

• Implemented a robust authentication system featuring secure login, registration with real-time validation, and email-based password reset functionality.
• Enhanced system security by integrating password_hash() for credential storage and enforcing CSRF protection on all forms to prevent cross-site attacks.
• Reduced vulnerability risks by utilizing PDO prepared statements to sanitize inputs and prevent SQL injection.

📊 Admin Analytics & Data Management

• Developed a comprehensive Admin Panel that provides high-level insights into user growth, total revenue, and system usage trends.
• Created visual reporting tools using Chart.js to track monthly registrations and geographic user distribution.
• Enabled data portability with CSV export functionality, allowing administrators to extract user data for external reporting and analysis.

⚙️ Scalable Database Architecture

• Designed a normalized MySQL schema with interconnected tables for Users, Invoices, and Items to ensure data integrity and fast query performance.
• Optimized session management to handle multi-user environments reliably, ensuring data isolation between User and Admin sessions.