StockKeeper - PHP Inventory & Stock Management System

StockKeeper is a clean, self-contained inventory and stock management system built in plain PHP and MySQL: no framework, no Composer, no build step, and nothing to compile. Buyers get a full admin panel to manage products, categories, and suppliers, log every stock receipt and sale with a full audit trail, and instantly see what needs reordering from a dedicated low-stock dashboard. It's built for freelancers and agencies to deploy in minutes on standard shared hosting: import one SQL file, edit one config file, and it's live. Every form is CSRF-protected, every query uses prepared statements, and passwords are properly hashed, so it's ready to hand off to a real client with confidence.

Features:

- Secure admin login with hashed passwords and session-based auth

- Full product catalog: SKU, name, description, category, supplier, cost, price, quantity, reorder threshold

- Category and Supplier management (add/edit/delete)

- Receive Stock and Sell/Remove Stock workflows with full movement history per product

- Stock deductions are race-safe: quantity can never go negative, even under concurrent requests

- Low-stock dashboard highlighting items at or below their reorder threshold

- One-click CSV export of current inventory

- At-a-glance KPIs: total SKUs, total inventory value, low-stock count

- Clean, modern, responsive dashboard UI with zero external CSS/JS framework dependencies

- CSRF protection on every state-changing form, output escaping throughout

- No Composer, no CLI, no framework: runs on standard PHP/MySQL shared hosting

- Well-commented, buyer-legible codebase organized by feature, easy to extend or re-skin

New in version 2:

- Purchase orders: create a PO for a supplier with multiple line items, then mark it received to automatically increase stock and log a movement for each line

- An optional barcode field and a counter lookup box that jumps straight to a product from an exact SKU or barcode match

- Stock take/adjustment support, so a manual count logs the difference with a reason such as damaged, lost, found, or correction

- A location/bin field per product with filtering by location

- Login rate limiting, hardened session cookies, and atomic stock updates so concurrent requests cannot corrupt the running count

Existing v1 customers can upgrade their database in place using the upgrade guide included with the download.

Requirements

PHP 7.4 or newer MySQL 5.7+ or MariaDB 10.3+

Compatibility

PHP 7.4 - 8.3, MySQL/MariaDB