README

A PHP package for calculating geographic distances using the Haversine formula. Perfect for applications needing to determine distances between coordinates or check if locations are within a specific radius.

Features

• 🌍 Calculate distances between geographic coordinates
• 📏 Support for both kilometers and miles
• 🎯 Check if points are within a given radius
• 🔄 Convert between different distance units
• 💪 Strong typing with PHP 7.4+ support
• 🧪 Comprehensive test suite

Installation

You can install the package via composer:

composer require vpro/geo-calculator

Usage

Basic Distance Calculation

use GeoCalculator\DistanceCalculator;

$calculator = new DistanceCalculator();

// Calculate distance between New York and London
$distance = $calculator->calculateDistance(
    40.7128, -74.0060,  // New York coordinates
    51.5074, -0.1278    // London coordinates
);

echo "Distance: " . round($distance, 2) . " km";

Check if Point is Within Radius

// Check if location is within 100km radius
$isNearby = $calculator->isWithinRadius(
    40.7128, -74.0060,  // Center point
    40.7614, -73.9776,  // Point to check
    100,                // Radius
    'km'                // Unit ('km' or 'mi')
);

if ($isNearby) {
    echo "Location is within radius";
}

Convert Between Units

// Convert 100 kilometers to miles
$miles = $calculator->convertDistance(
    100,    // Distance
    'km',   // From unit
    'mi'    // To unit
);

echo "100 km = " . round($miles, 2) . " miles";

API Reference

calculateDistance()

Calculate the distance between two geographic points.

public function calculateDistance(
    float $lat1,
    float $lon1,
    float $lat2,
    float $lon2,
    string $unit = 'km'
): float

Parameters:

• $lat1: Latitude of first point in degrees
• $lon1: Longitude of first point in degrees
• $lat2: Latitude of second point in degrees
• $lon2: Longitude of second point in degrees
• $unit: Unit of measurement ('km' or 'mi', defaults to 'km')

isWithinRadius()

Check if a point is within a specified radius of another point.

public function isWithinRadius(
    float $lat1,
    float $lon1,
    float $lat2,
    float $lon2,
    float $radius,
    string $unit = 'km'
): bool

Parameters:

• $lat1: Latitude of center point in degrees
• $lon1: Longitude of center point in degrees
• $lat2: Latitude of point to check in degrees
• $lon2: Longitude of point to check in degrees
• $radius: Radius to check within
• $unit: Unit of measurement ('km' or 'mi', defaults to 'km')

convertDistance()

Convert distances between different units.

public function convertDistance(
    float $distance,
    string $from,
    string $to
): float

Parameters:

• $distance: Distance to convert
• $from: Original unit ('km' or 'mi')
• $to: Target unit ('km' or 'mi')

Testing

composer test

Contributing

Please see CONTRIBUTING.md for details.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Security

If you discover any security-related issues, please email your.email@example.com instead of using the issue tracker.

Credits

• V-PRO

License

The MIT License (MIT). Please see License File for more information.