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- <?php
- // CustomPages : Browser language detection
- // Include this file in your custom page if you want to set the language variable of the Chamilo session to the best pick according to the visitor's browser's options.
- // 2011, Jean-Karim Bockstael, CBlue <jeankarim@cblue.be>
- // This requires the Chamilo system to be initialized
- // (note that it's easier to do the following include in the parent page)
- // require_once('path/to/main/inc/global.inc.php');
- // Returns the best match between available languages and visitor preferences
- // return the best match as 2-chars code, null when none match
- function get_preferred_language($available_langs) {
- // Parsing the Accept-languages HTTP header
- $langs = array();
- foreach (explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']) as $httplang) {
- $rawlang = explode(';q=', $httplang);
- if (strpos($rawlang[0], '-') !== FALSE) {
- // We ignore the locale part, as in en-GB vs en-US
- $rawlang[0] = substr($rawlang[0], 0, strpos($rawlang[0], '-'));
- }
- if (count($rawlang) == 1) {
- $rawlang[1] = 1.0; // The absence of weighting means a weight of 1 (max)
- }
- $langs[$rawlang[1]][] = $rawlang[0];
- }
- krsort($langs, SORT_NUMERIC);
- // Choosing the best match
- foreach($langs as $weight => $codes) {
- foreach ($codes as $code) {
- if (in_array($code, $available_langs)) {
- return $code;
- }
- }
- }
- // No match
- return null;
- }
- // Wrapper function for the get_lang function
- // use this if you want to avoid translation caching issues
- function cp_get_lang($variable) {
- return get_lang($variable, null, $_SESSION['user_language_choice']);
- }
- // Note that Chamilo languages are expressed as full english names, not 2-characters codes
- // e.g. 'english' instead of 'en', 'french' instead of 'fr', ...
- // We need a matching array. Note the value for the null key, which is the default language.
- // Also note that this is an example matchin array, not all languages are present.
- $chamilo_langs = array(null => 'english', 'en' => 'english', 'fr' => 'french', 'es' => 'spanish');
- // Which of these can we actually pick from ?
- $available_langs = array('en','fr');
- // Which language files will we need ?
- $language_file = array('courses', 'index', 'registration', 'admin','userInfo');
- // Let's find out which language to serve to this particular browser
- $lang_match = $chamilo_langs[get_preferred_language($available_langs)];
- // Chamilo overrides this parameters at some places, e.g. in the logout link
- if (isset($_REQUEST['language']) && !empty($_REQUEST['language']) && in_array($_REQUEST['language'], $chamilo_langs)) {
- $lang_match = $_REQUEST['language'];
- }
- // Maybe a language had already been selected, we should honor this
- if (isset($_SESSION['user_language_choice']) && in_array($_SESSION['user_language_choice'], $chamilo_langs)) {
- $lang_match = $_SESSION['user_language_choice'];
- }
- // We need to set the relevant session variables to the best match, to use Chamilo's i18n lib.
- $_user['language'] = $lang_match;
- $_SESSION['user_language_choice'] = $lang_match;
- ?>
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