# Changelog - Geolocation IP Tracker API

All notable changes to this project will be documented in this file.

## [1.0.0] - 2026-03-08

### Added
- Initial release of Geolocation IP Tracker API
- IP geolocation lookup using ip-api.com service
- Bulk IP lookup functionality
- Private IP detection and handling
- Built-in caching system (1 hour cache)
- CORS support for web applications
- Comprehensive error handling
- Interactive demo interface
- Complete API documentation
- Test suite for debugging
- Apache .htaccess configuration
- Security headers and optimizations

### Features
- **IP Detection**: Automatic client IP detection with fallback support
- **Private IP Handling**: Proper identification and response for private IP ranges
- **Caching**: File-based caching to improve performance
- **Bulk Operations**: Process multiple IPs in single request
- **Debug Mode**: Optional debug information for development
- **Security**: Input validation and security headers
- **Documentation**: Complete API documentation with examples

### IP Types Supported
- Public IPs (full geolocation data)
- Private Class A (10.x.x.x)
- Private Class B (172.16.x.x - 172.31.x.x)
- Private Class C (192.168.x.x)
- Loopback (127.x.x.x)
- Link-Local (169.254.x.x)
- IPv6 private ranges

### API Endpoints
- `GET /index.php` - Get current IP location
- `GET /index.php?ip={address}` - Get specific IP location
- `POST /index.php/bulk` - Bulk IP lookup
- `GET /index.php/docs` - API documentation

### Files
- `index.php` - Main API endpoint
- `demo.php` - Interactive demo interface
- `docs.php` - Complete API documentation
- `test.php` - Testing dashboard
- `README.md` - Project documentation
- `.htaccess` - Apache configuration
- `package.json` - Project metadata
- `cache/` - Cache directory

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## Developer Information

**Author**: RSK World  
**Founder**: Molla Samser  
**Designer & Tester**: Rima Khatun  
**Website**: https://rskworld.in  
**Contact**: help@rskworld.in, +91 93305 39277  
**Year**: 2026  

© 2026 RSK World. All rights reserved.
