Tính Khoảng Cách GoogleMap với SQL

select
                        *, (6371 * acos(cos(radians(".$_POST['latLocation'].")) * cos(radians(a.intLat)) * cos(radians(a.intLng) - radians(".$_POST['lngLocation'].")) + sin(radians(".$_POST['latLocation'].")) * sin(radians(a.intLat)))) as distance
                from
        `table`