PHP method to calculate the distance between two coordinates (longitude, latitude), coordinate longitude_PHP tutorial

How PHP calculates the distance between two coordinates (longitude, latitude), coordinate longitude

This article describes the example of PHP calculating the distance between two coordinates (longitude, latitude) method. Share it with everyone for your reference. The details are as follows:

Here, PHP is used to calculate the distance between two coordinates (longitude, latitude), and the result is returned in meters or kilometers

function distance($lat1, $lng1, $lat2, $lng2, $miles = true)
{
 $pi80 = M_PI / 180;
 $lat1 *= $pi80;
 $lng1 *= $pi80;
 $lat2 *= $pi80;
 $lng2 *= $pi80;
 $r = 6372.797; // mean radius of Earth in km
 $dlat = $lat2 - $lat1;
 $dlng = $lng2 - $lng1;
 $a = sin($dlat/2)*sin($dlat/2)+cos($lat1)*cos($lat2)*sin($dlng/2)*sin($dlng/2);
 $c = 2 * atan2(sqrt($a), sqrt(1 - $a));
 $km = $r * $c;
 return ($miles ? ($km * 0.621371192) : $km);
}

I hope this article will be helpful to everyone’s PHP programming design.

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