Calculate the distance between 2 coordinates

distance.php

<?php
/* 
* Calculate the distance between 2 coordinates
* By James Roffey - https://jroffey.me
*/

function distance($start, $last){
	
    $theta = $start[1] - $end[1];
    $dist = sin(deg2rad($start["0"])) * sin(deg2rad($last[0])) +  cos(deg2rad($start[0])) * cos(deg2rad($last[0])) * cos(deg2rad($theta));
	
    $dist = acos($dist);
    $dist = rad2deg($dist);
    $miles = $dist * 60 * 1.1515;
	
    return $miles;
}
?>