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php calculate distance between lat, lng loc
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function getDistance($lat1, $lng1, $lat2, $lng2) { | |
$earthRadius = 6367000; //approximate radius of earth in meters | |
$lat1 = ($lat1 * pi()) / 180; | |
$lng1 = ($lng1 * pi()) / 180; | |
$lat2 = ($lat2 * pi()) / 180; | |
$lng2 = ($lng2 * pi()) / 180; | |
$calcLongitude = $lng2 - $lng1; | |
$calcLatitude = $lat2 - $lat1; | |
$stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2); | |
$stepTwo = 2 * asin(min(1, sqrt($stepOne))); | |
$calculatedDistance = $earthRadius * $stepTwo; | |
return round($calculatedDistance); | |
} |
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