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53 lines
1.7 KiB
53 lines
1.7 KiB
<?php
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/* For licensing terms, see /license.txt */
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/**
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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
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* 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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* This requires the Chamilo system to be initialized
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* (note that it's easier to do the following include in the parent page).
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*
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* @package chamilo.custompages
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*/
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/**
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* Returns the best match between available languages and visitor preferences.
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*
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* @return string the best match as 2-chars code, null when none match
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*/
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function get_preferred_language($available_langs)
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{
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// Parsing the Accept-languages HTTP header
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$langs = [];
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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 $code;
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}
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}
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}
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// No match
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return null;
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}
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/**
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* Get a language variable in a specific language.
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*/
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function custompages_get_lang($variable)
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{
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return get_lang($variable, null, $_SESSION['user_language_choice']);
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}
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