PHP calculate distance between two GPS points

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#lon is the longitude, lat is the latitude, don’t make a mistake

,$ lat1,$lon2,$lat2){ 2*ATAN2(

(SIN(($lat1-$lat2)*PI( )/180 /2)                                                                                                                                             lat2)*PI( )/

180/2)+ lat2*PI()/ 180)*COS($lat1*PI()

180 )                                                                             (($lon1-$lon2)*PI()/ 180/2

*PI()/ 180/2)), SIN(($lat1 -$lat2

*PI()/180/2) *SIN (($lat1-$lat2)*

()/180 /2) +COS($lat2*PI()/180 )*COS(

lat1*PI()/180)

                                                                        PI()/180 /2) $lon2)*PI ()/180/

2))))*6378140; } Calling method: echo distance(39.91917,116.3896,39.91726,116.3940);1 echo distance(

39.91917,116.3896

The above introduces PHP to calculate the distance between two GPS points, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.