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Editing: class.distance.php
<?php namespace WPGMZA; if(!defined('ABSPATH')) return; class Distance { const UNITS_KM = "km"; const UNITS_MI = "mi"; const MILES_PER_KILOMETER = 0.621371; const KILOMETERS_PER_MILE = 1.60934; public static function between($a, $b) { if(!($a instanceof LatLng)) throw new \Exception('First argument is not an instance of WPGMZA\LatLng'); if(!($b instanceof LatLng)) throw new \Exception('Second argument is not an instance of WPGMZA\LatLng'); $lat1 = $a->lat; $lon1 = $a->lng; $lat2 = $b->lat; $lon2 = $b->lng; $dLat = deg2rad($lat2 - $lat1); $dLon = deg2rad($lon2 - $lon1); $a = sin($dLat / 2) * sin($dLat / 2) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLon / 2) * sin($dLon / 2); $c = 2 * atan2(sqrt($a), sqrt(1 - $a)); $d = 6371 * $c; return $d; } }
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