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@lslucas
Created October 25, 2010 16:03
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PHP: Calcula distancias pela latitude e longitude
/*
* Calcula distancias
*/
function distance($lat1, $lon1, $lat2, $lon2, $unit) {
$theta = $lon1 - $lon2;
$dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
$dist = acos($dist);
$dist = rad2deg($dist);
$miles = $dist * 60 * 1.1515;
$unit = strtoupper($unit);
if ($unit == "K")
return ($miles * 1.609344);
else if ($unit == "N")
return ($miles * 0.8684);
else
return $miles;
}
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