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<?php |
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namespace DrMVC\Helpers; |
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/** |
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* Simple geoposition class based on below answer |
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* @link http://stackoverflow.com/a/17286519/7977798 |
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* @package DrMVC\Helpers |
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*/ |
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class Geo |
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{ |
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/** |
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* Generate array of random coordinates for tests |
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* |
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* @param int $radius In kilometers |
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* @return array |
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*/ |
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public static function randomCoordinates(int $radius = 100): array |
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{ |
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$result = []; |
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try { |
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// Random angle (from 0 bad idea) |
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$angle = deg2rad(random_int(1, 359)); |
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// Random radius (from 0 bad idea) |
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$pointRadius = random_int(1, $radius); |
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// Result array |
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$result = [ |
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// Latitude |
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sin($angle) * $pointRadius, |
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// Longitude |
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cos($angle) * $pointRadius |
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]; |
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} catch (\Exception $e) { |
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echo $e->getMessage() . "\n"; |
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} |
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return $result; |
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} |
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/** |
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* Generate array of random coordinates for tests |
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* |
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* @param int $count Count of results |
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* @param int $radius In kilometers |
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* @return array |
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*/ |
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public static function randomCoordinatesArray($count = 1, int $radius = 100): array |
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{ |
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$result = []; |
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// If count is set |
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for ($i = 0; $i < $count; $i++) { |
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$result[] = self::randomCoordinates($radius); |
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} |
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return $result; |
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} |
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/** |
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* The length of an arc of a unit circle is numerically equal to |
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* the measurement in radians of the angle that it subtends. |
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* |
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* @link https://en.wikipedia.org/wiki/Radian |
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* @param string $degree The number needed to calculate radians |
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* @return float|int |
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*/ |
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public static function radians($degree) |
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{ |
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return $degree * M_PI / 180; |
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} |
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/** |
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* Return array of coordinates within some radius |
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* |
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* @param array $coordinates Multidimensional array with coordinates for comparing [[latitude,longitude],[latitude,longitude],[latitude,longitude]] |
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* @param array $center Array with coordinates of center [latitude,longitude] |
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* @param int|float $radius In kilometers or meters (1 - km, .1 - 100 meters) |
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* @return array Simple array with LAT,LON coordinates which are within the radius |
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*/ |
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public static function getCoordinatesWithinRadius(array $coordinates, array $center, $radius): array |
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{ |
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$resultArray = []; |
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foreach ($coordinates as $key => $coordinate) { |
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if (self::isCoordinatesInRadius($coordinate, $center, $radius)) { |
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$resultArray[$key] = $coordinate; |
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} |
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} |
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return $resultArray; |
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} |
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/** |
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* Check if coordinates is nearby center in radius |
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* |
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* @param array $coordinates Array with coordinates for comparing [latitude,longitude] |
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* @param array $center Array with coordinates of center [latitude,longitude] |
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* @param int|float $radius In kilometers or meters (1 - km, .1 - 100 meters) |
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* @return bool |
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*/ |
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public static function isCoordinatesInRadius(array $coordinates, array $center, $radius): bool |
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{ |
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list($lat1, $long1) = $center; |
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list($lat2, $long2) = $coordinates; |
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$distance = 3959 * acos(cos(self::radians($lat1)) * cos(self::radians($lat2)) * cos(self::radians($long2) - self::radians($long1)) + sin(self::radians($lat1)) * sin(self::radians($lat2))); |
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return ($distance <= $radius); |
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} |
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} |
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drmvc /
helpers
