get origin for request symfony code example

Example: get origin for request symfony

if (array_key_exists('HTTP_ORIGIN', $_SERVER)) {
    $origin = $_SERVER['HTTP_ORIGIN'];
}
else if (array_key_exists('HTTP_REFERER', $_SERVER)) {
    $origin = $_SERVER['HTTP_REFERER'];
} else {
    $origin = $_SERVER['REMOTE_ADDR'];
}