PHP根据两点间的经纬度计算距离

这是一个不错的示例，直接贴代码，首先要知道纬度值、经度值

 
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); 
}