Direction of two points

gistfile1.aw

<?php
function getDirection($point1,$point2){
    $lat1 = $point1->lat;
    $lng1 = $point1->lng;
    $lat2 = $point1->lat;
    $lng2 = $point1->lng;
    $Y = cos($lat2) * sin($lng2 - $lng1);
    $X = cos($lat1) * sin($lat2) - sin($lat1) * cos($lat2) * cos($lng2 - $lng1);
    $a = atan2($Y, $X);
    if($a <0){
        $a += 2 * M_PI;
    }
    $a = $a * 180 / M_PI;
    return $a;
}
?>