/**
* check if value in the given attribute is a valid language code
* return true if valid, otherwise, return false
*/
public static function isValidLangCode($code)
{
// The allowed characters in a valid language code are letters, numbers or dash(-).
if (!preg_match("/^[a-zA-Z0-9-]+\$/", $code)) {
return false;
}
$code = BasicChecks::cutOutLangCode($code);
$langCodesDAO = new LangCodesDAO();
if (strlen($code) == 2) {
$rows = $langCodesDAO->GetLangCodeBy2LetterCode($code);
} else {
if (strlen($code) == 3) {
$rows = $langCodesDAO->GetLangCodeBy3LetterCode($code);
} else {
return false;
}
}
return is_array($rows);
}
/**
* return language code that is defined in the given html
* return language code
*/
public static function getLangCode()
{
global $global_content_dom;
// get html language
$e_htmls = $global_content_dom->find("html");
foreach ($e_htmls as $e_html) {
if (isset($e_html->attr["xml:lang"])) {
$lang = trim($e_html->attr["xml:lang"]);
break;
} else {
if (isset($e_html->attr["lang"])) {
$lang = trim($e_html->attr["lang"]);
break;
}
}
}
return BasicChecks::cutOutLangCode($lang);
}
