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