src/Bearing/BearingSpherical.php
public function calculateBearing(Coordinate $point1, Coordinate $point2): float
    {
        $lat1 = deg2rad($point1->getLat());
        $lat2 = deg2rad($point2->getLat());
        $lng1 = deg2rad($point1->getLng());
        $lng2 = deg2rad($point2->getLng());

        $y = sin($lng2 - $lng1) * cos($lat2);
        $x = cos($lat1) * sin($lat2) - sin($lat1) * cos($lat2) * cos($lng2 - $lng1);

        $bearing = rad2deg(atan2($y, $x));

        if ($bearing < 0) {
            $bearing = fmod($bearing + 360, 360);
        }

        return $bearing;
    }
public function calculateBearing(Coordinate $point1, Coordinate $point2): float
    {
        $lat1 = deg2rad($point1->getLat());
        $lat2 = deg2rad($point2->getLat());
        $lng1 = deg2rad($point1->getLng());
        $lng2 = deg2rad($point2->getLng());

        $y = sin($lng2 - $lng1) * cos($lat2);
        $x = cos($lat1) * sin($lat2) - sin($lat1) * cos($lat2) * cos($lng2 - $lng1);

        $bearing = rad2deg(atan2($y, $x));

        if ($bearing < 0) {
            $bearing = fmod($bearing + 360, 360);
        }

        return $bearing;
    }
public function calculateBearing ( Coordinate $ point1 , Coordinate $ point2 ) : float { $ lat1 = deg2rad ( $ point1 -> getLat ( ) ) ; $ lat2 = deg2rad ( $ point2 -> getLat ( ) ) ; $ lng1 = deg2rad ( $ point1 -> getLng ( ) ) ; $ lng2 = deg2rad ( $ point2 -> getLng ( ) ) ; $ y = sin ( $ lng2 - $ lng1 ) * cos ( $ lat2 ) ; $ x = cos ( $ lat1 ) * sin ( $ lat2 ) - sin ( $ lat1 ) * cos ( $ lat2 ) * cos ( $ lng2 - $ lng1 ) ; $ bearing = rad2deg ( atan2 ( $ y , $ x ) ) ; if ( $ bearing < 0 ) { $ bearing = fmod ( $ bearing + 360 , 360 ) ; } return $ bearing ; }
This method calculates the initial bearing between the
two points.

@param Coordinate $point1
@param Coordinate $point2

@return float Bearing Angle
This method calculates the initial bearing between the two points .