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