header, a cookie or host name
$supported_languages = array(
"no" => 1, /* Norwegian */
"en" => 1 /* English */
);
$default_language = "en";
/* Try to figure out which language to use.
*/
function negotiate_language($lang) {
global $supported_languages, $HTTP_ACCEPT_LANGUAGE;
if (isset($supported_languages[$lang])) {
return $lang;
}
/* If the client has sent an Accept-Language: header,
* see if it is for a language we support.
*/
if ($HTTP_ACCEPT_LANGUAGE) {
$accepted = explode( ",", $HTTP_ACCEPT_LANGUAGE);
for ($i = 0; $i < count($accepted); $i++) {
if ($supported_languages[$accepted[$i]]) {
return $accepted[$i];
}
}
}
/* One last desperate try: check for a valid language code in the
* top-level domain of the client's source address.
*/
if (eregi( "\\.[^\\.]+$"", $REMOTE_HOST, &$arr)) {
$lang = strtolower($arr[1]);
if ($supported_languages[$lang]) {
return $lang;
}
}
global $default_language;
return $default_language;
}
?>