Which direction does Jeb needs to head to?
The geospatial extension has a function for this too:
'Point', 'coordinates' => [ 45.74, -47.11 ] ];
$ksp = [ 'type' => 'Point', 'coordinates' => [ -74.57527, -0.1025 ] ];
var_dump((initial_bearing($jeb, $ksp) + 360) % 360);
?>]]>