orafaelfragoso/php-haversine-formula

Calculates de distance between two geocode points 📌🗺

php-haversini-formula

Calculates de distance between two geocode points 📌🗺

How to use it:

Install the library via Composer or clone the repo:

composer install rafaelfragoso/haversini-formula

After the installation is complete, you can load the class and start using it.

<?php

use Haversini\Haversini;

/*
 * Calculate distance from Rio de Janeiro to São Paulo
 * Rio: -22.906847, -43.172896
 * São Paulo: -23.550520, -46.633309
 */
Haversini::calculate(
    -22.906847,
    -43.172896,
    -23.550520,
    -46.633309,
    'mi' // Output length unit
);

Running tests

make test or make test-coverage

XDebug is required for test coverage!

Authors

• Rafael Fragoso - Initial work
• Leonardo Carmo - Version 2

See also the list of contributors who participated in this project.

License

This project is licensed under the MIT License - see the LICENSE.md file for details

php-haversine-formula's Issues

set precision

This works AMAZING! Thank you for making and sharing this little diddy. For my purposes, I have re-worked the code slightly to allow users to specify the precision of rounding the results, or default to 0 if it is not specified. My project has some less than 1 mile away so I liked the precision to have 3 decimal places. If you like, I encourage you to update the Distance class

class Distance {

	private static function calculate($fromLat, $fromLon, $toLat, $toLon, $precision = 0) {
		$earth_radius = 6371;

		$dLat = deg2rad($toLat - $fromLat);
		$dLon = deg2rad($toLon - $fromLon);
		
		$a = sin($dLat/2) * sin($dLat/2) + cos(deg2rad($fromLat)) * cos(deg2rad($toLat)) * sin($dLon/2) * sin($dLon/2);
		$c = 2 * asin(sqrt($a));
		$d = $earth_radius * $c;
		
		return round($d, $precision);
	}
  
  public static function toKilometers($fromLat, $fromLon, $toLat, $toLon, $precision = 0) {
	  return self::calculate($fromLat, $fromLon, $toLat, $toLon);
	}

  public static function toMiles($fromLat, $fromLon, $toLat, $toLon, $precision = 0) {
    $distance = self::calculate($fromLat, $fromLon, $toLat, $toLon, $precision);
	  return round($distance * 0.621371192, $precision);
	}

}