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Detect User Preferred Language
Detects the preferred user language.
//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com
class Language{
private static $language = null;
public static function get(){
new Language;
return self::$language;
}
public static function getBestMatch($langs = array()){
foreach($langs as $n => $v)
$langs[$n] = strtolower($v);
$r = array();
foreach(self::get() as $l => $v){
($s = strtok($l, '-')) != $l && $r[$s] = 0;
if(in_array($l, $langs))
return $l;
}
foreach($r as $l => $v)
if(in_array($l, $langs))
return $l;
return null;
}
private function __construct(){
if(self::$language !== null)
return;
if(($list = strtolower($_SERVER['HTTP_ACCEPT_LANGUAGE']))){
if(preg_match_all('/([a-z]{1,8}(?:-[a-z]{1,8})?)(?:;q=([0-9.]+))?/', $list, $list)){
self::$language = array_combine($list[1], $list[2]);
foreach(self::$language as $n => $v)
self::$language[$n] = +$v ? +$v : 1;
arsort(self::$language);
}
}
else
self::$language = array();
}
}
example
print_r(Language::get()); //languages ordered by preference
print_r(Language::getBestMatch(array('pt-br', 'pt', 'en'))); //retrieves the best match given a list of available languages
