gistfile1.txt

// Access-Control headers are received during OPTIONS requests
if ($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {

	if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_METHOD']))
         	header("Access-Control-Allow-Methods: GET, POST, OPTIONS, DELETE, PUT");

     	if (isset($_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']))
         	header("Access-Control-Allow-Headers: {$_SERVER['HTTP_ACCESS_CONTROL_REQUEST_HEADERS']}");

	exit(0);
}