1 function rad($d)
2 {
3 return $d * 3.1415926535898 / 180.0;
4 }
5 function GetDistance($lat1, $lng1, $lat2, $lng2)
6 {
7 $EARTH_RADIUS = 6378.137;
8 $radLat1 = rad($lat1);
9 //echo $radLat1;
10 $radLat2 = rad($lat2);
11 $a = $radLat1 - $radLat2;
12 $b = rad($lng1) - rad($lng2);
13 $s = 2 * asin(sqrt(pow(sin($a/2),2) +
14 cos($radLat1)*cos($radLat2)*pow(sin($b/2),2)));
15 $s = $s *$EARTH_RADIUS;
16 $s = round($s * 10000) / 10000;
17 return $s;
18 }
破罐子互摔
