LangQuery 1.2

<?php
error_reporting(E_ALL);
// If langquery.php is called by its own, not included.
if(count(get_included_files())==1){
    if(isset($_GET[json])){$L = new LangQuery(); echo $L->json();}
}

class LangQuery{
    public $default = "en";
    public $list,$data,$current;
    public $language_folder = "language";
    public $get_parameter = "Language";
    public $cookie_name = "Language";
    public $cookie_expire = 31536000; // 365 days in seconds
    public $domain = ($_SERVER['SERVER_NAME']);
    public $page = basename($_SERVER['PHP_SELF']);

    public function __construct($auto=TRUE){
        if(!is_dir(dirname(__FILE__)."/$this->language_folder")){die("LANGQUERY : No language folder /$this->language_folder/");}
        $this->list = str_replace(".ini","",array_slice(scandir(dirname(__FILE__)."/$this->language_folder"),2));
        if(count($this->list)==0){
            die("LANGQUERY : No language file in /$this->language_folder/ directory. Please add at least default language $this->default.ini");
        }
        if($auto){
            if($this->is_valid($_GET[$this->get_parameter])){
                $this->load($_GET[$this->get_parameter]);
            }else{
                if($this->is_valid($_COOKIE[$this->cookie_name])){
                    $this->load($_COOKIE[$this->cookie_name]);
                }elseif($this->is_valid($this->browser())){
                    $this->load($this->browser(),FALSE);
                }else{
                    $this->load($this->default,FALSE);
                }
            }
        }
    }
    /* USTAWIENIE ADRESU */
    $this->setaddress();
    $this->page = basename($_SERVER['PHP_SELF']);
    $this->domain = ($_SERVER['SERVER_NAME']);

    public function __invoke(){
        $arguments=func_get_args();
        $key=$arguments[0];
        array_shift($arguments);
        preg_match("/(?P<operation>[>]?)(\[(?P<language>\w+)\])?(?P<key>\w+)/", $key, $matches);
        $text = $this->find($matches['key'], $arguments, $matches['language']);
        if($matches['operation']==">"){
            echo($text);
        }else{
            return $text;
        }
    }
    public function browser(){
        return substr($_SERVER["HTTP_ACCEPT_LANGUAGE"],0,2);
    }
    public function is_valid($language){
        return in_array($language,$this->list);
    }
    public function load($language,$save_cookie=TRUE){
        $this->ini_loader($language);
        $this->current = $language;
        if($save_cookie) setcookie($this->cookie_name, $language, time()+$this->cookie_expire,"/");
    }
    public function free($language=""){
        if($language==""){
            $this->data = array();
        }else{
            if(isset($this->data[$language])) unset($this->data[$language]);
        }
    }
    private function ini_loader($language){
        if(!isset($this->data[$language])){
            if($this->is_valid($language)){
                $this->data[$language] = parse_ini_file(dirname(__FILE__)."/$this->language_folder/$language.ini");
            }else{
                die("LANGQUERY : No such language file : $this->language_folder/$language.ini");
            }
        }
    }
    private function find($key,$arguments="",$language=""){
        if($language==""){
            $language=$this->current;
        }else{
            $this->ini_loader($language);
        }
        return
            isset($this->data[$language][$key])
                ? vsprintf($this->data[$language][$key],$arguments)
                : "<script>alert('LANGQUERY : UNDEFINED_LANGUAGE_KEY[$language][$key]')</script>";
    }
    public function json(){
        return json_encode($this->data[$this->current]);
    }
    /* USTAWIANIE ADRESU - PATRZ TEZ LINIJKA 38 */
     public function setaddress(){
    /* JESLI JEZYK ZOSTAL USTAWIONY - ZMIEN HEADER NA TEN JEZYK */
        if(isset($this->data[$language]))
            header("Location: ".$language=$this->current.'/' .$page);
    /* JESLI JEZYK NIE ZOSTAL USTAWIONY - ZMIEN HEADER NA JEZYK PODSTAWOWY*/
        if(!in_array($language,$this->list))
            header("Location: ".'/'.$default.'/' .$page);
    }
}
?>