Expolibre-3-www/htdocs/lib/i18n.php

<?php
$current_dir= basename (getcwd ());

/*
 * Language registration
 */

$registered_languages= array();

function register_lang ( $code, $lang ) {
  global $registered_languages;
  $registered_languages[$code]= $lang;
}

if ($current_dir == "htdocs")
  include ("languages.php");
else
  include ("../languages.php");

/*
 * Prefered language detection
 */

function prefered_language () {
  global $registered_languages;
  $locale= locale_accept_from_http ($_SERVER['HTTP_ACCEPT_LANGUAGE']);
  return locale_lookup (array_keys ($registered_languages), $locale, true, 'fr');
}

/*
 * URL translation
 */

function url_translate ($url, $to) {
  global $registered_languages;

  $current_dir= basename (getcwd ());
  if ($current_dir == "htdocs")
    $from= 'fr';
  else
    $from= $current_dir;
  
  $name= basename ($url);
  $index= array_search ($name, $registered_languages[$from]['pages']);
  if (!$index)
    return $registered_languages[$to]['loc'];
  return $registered_languages[$to]['loc'] . $registered_languages[$to]['pages'][$index];
}


/*
 * Redirect to prefered language, if needed, when referer is none or ourself
 */
if (!isset ($_SERVER['HTTP_REFERER']) or strrpos ($_SERVER['HTTP_REFERER'], $_SERVER['SERVER_NAME']) === false) {
  if ($current_dir == "htdocs")
    $current_dir= $registered_languages['fr']['loc'];
  $prefered_dir= $registered_languages[prefered_language ()]['loc'];
  if (basename($current_dir) != basename ($prefered_dir)) {
    header ("Location: " . $prefered_dir);
    exit ();
  }
}

?>