#lon为经度，lat为纬度，一定不要弄错了哦
function distance($lon1, $lat1, $lon2, $lat2){
return (2*ATAN2(SQRT(SIN(($lat1-$lat2)*PI()/180/2)
*SIN(($lat1-$lat2)*PI()/180/2)+
COS($lat2*PI()/180)*COS($lat1*PI()/180)
*SIN(($lon1-$lon2)*PI()/180/2)
*SIN(($lon1-$lon2)*PI()/180/2)),
SQRT(1-SIN(($lat1-$lat2)*PI()/180/2)
*SIN(($lat1-$lat2)*PI()/180/2)
+COS($lat2*PI()/180)*COS($lat1*PI()/180)
*SIN(($lon1-$lon2)*PI()/180/2)
*SIN(($lon1-$lon2)*PI()/180/2))))*6378140;
}
调用方法：echo distance(39.91917,116.3896,39.91726,116.3940);
调用方法：echo distance(39.91917,116.3896,39.91726,116.3940);
关键字词:
