PHP calculate distance between two GPS points

The following is a PHP function to calculate the distance between two GPS points:

PHP calculates the distance between two GPS points
Mysql calculates the distance between two GPS coordinates
javascript calculates the distance between two GPS points

#lon is longitude, lat is latitude, don’t make a mistake function <span><a href="http://www.aiezu.com/tag/distance" title="View all articles in distance" target="_blank">distance</a></ span>($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; }

39.91726

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#lon is the longitude, lat is the latitude, don’t make a mistake ,$ lat1,$lon2,$lat2){ 2*ATAN2( SQRT (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-$lat2)* PI ()/180 /2) +COS($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 ,

,116.3940

)

;

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.