<?php
class detect_language {
    var $available_languages, $accepted_language, $detected_language;
    // Constructor
    function detect_language() {
      $this->available_languages = array(
        'en'         => array('en([-_][[:alpha:]]{2})?|english', 'english'),
        'es'         => array('es([-_][[:alpha:]]{2})?|spanish', 'spanish'),
        'it'         => array('it|italian', 'italian')
/*
        'bg'         => array('bg|bulgarian', 'bulgarian-win1251'),
        'ca'         => array('ca|catalan', 'catala'),
        'cs-iso'     => array('cs|czech', 'czech-iso'),
        'cs-win1250' => array('cs|czech', 'czech-win1250'),
        'da'         => array('da|danish', 'danish'),
        'de'         => array('de([-_][[:alpha:]]{2})?|german', 'german'),
        'fr'         => array('fr([-_][[:alpha:]]{2})?|french', 'french'),
        'ja'         => array('ja|japanese', 'japanese'),
        'ko'         => array('ko|korean', 'korean'),
        'nl'         => array('nl([-_][[:alpha:]]{2})?|dutch', 'dutch'),
        'no'         => array('no|norwegian', 'norwegian'),
        'pl'         => array('pl|polish', 'polish'),
        'pt-br'      => array('pt[-_]br|brazilian portuguese', 'brazilian_portuguese'),
        'pt'         => array('pt([-_][[:alpha:]]{2})?|portuguese', 'portuguese'),
        'ru-koi8r'   => array('ru|russian', 'russian-koi8'),
        'ru-win1251' => array('ru|russian', 'russian-win1251'),
        'se'         => array('se|swedish', 'swedish'),
        'sk'         => array('sk|slovak', 'slovak-iso'),
        'th'         => array('th|thai', 'thai'),
        'zh-tw'      => array('zh[-_]tw|chinese traditional', 'chinese_big5'),
        'zh'         => array('zh|chinese simplified', 'chinese_gb')
*/
      );
      $this->accepted_language = explode(',', getenv('HTTP_ACCEPT_LANGUAGE'));
      $this->detected_language = $this->getLanguage();
    }
    function getLanguage() {
      if (empty($this->detected_language)) {
        $this->detected_language = 'en';
        $cnt = 0;
        while ($cnt < sizeof($this->accepted_language)) {
          reset($this->available_languages);
          while (list($key, $value) = each($this->available_languages)) {
//            if ((@eregi('^(' . $value[0] . ')(;q=[0-9]\.[0-9])?$', $this->accepted_language[$cnt]))) {
            if(preg_match('/^(' . $value[0] . ')(;q=[0-9]\.[0-9])?$/i', $this->accepted_language[$cnt])){
              $this->detected_language = $key;
              break 2;
            }
          }
          $cnt++;
        }
      }
      return $this->detected_language;
    }
  }
?>