Multisite and language switcher

Dear support,

I would like to be able to add in the Theme the possibility depending on the language detection from the browser to add the redirection to the multi site installation that I have made.

For example:

<?php

$languages = array(‘da’, ‘de’, ‘el’, ‘en’, ‘es’, ‘fr’, ‘is’, ‘it’, ‘nl’, ‘no’, ‘pt’, ‘fi’, ‘sv’);

if (isset($_POST[‘language’])) {
$lang = $_POST[‘language’];
} else {
$lang = substr($_SERVER[‘HTTP_ACCEPT_LANGUAGE’], 0, 2);
}

if (in_array($lang, $languages)) {
header(‘Location: ‘ . $lang);
} else {
header(‘Location: en’);
}

This without compromising theme. Thx a lot in advanced for any tips you may suggest.

Ping me for the testing site. I prefer not expose to public the url.