PHP计算2点经纬度之间的距离代码

function getDistanceBetweenPointsNew($latitude1, $longitude1, $latitude2, $longitude2) {
    $theta = $longitude1 - $longitude2;
    $miles = (sin(deg2rad($latitude1)) * sin(deg2rad($latitude2))) + (cos(deg2rad($latitude1)) * cos(deg2rad($latitude2)) * cos(deg2rad($theta)));
    $miles = acos($miles);
    $miles = rad2deg($miles);
    $miles = $miles * 60 * 1.1515;
    $feet = $miles * 5280;
    $yards = $feet / 3;
    $kilometers = $miles * 1.609344;
    $meters = $kilometers * 1000;
    return compact(miles,feet,yards,kilometers,meters);
}

$point1 = array(lat => 40.770623, long => -73.964367);
$point2 = array(lat => 40.758224, long => -73.917404);
$distance = getDistanceBetweenPointsNew($point1[lat], $point1[long], $point2[lat], $point2[long]);
foreach ($distance as $unit => $value) {
    echo $unit.: .number_format($value,4).<br />;
}

The example returns the following:

miles: 2.6025
feet: 13,741.4350
yards: 4,580.4783
kilometers: 4.1884
meters: 4,188.3894