95 lines
2.7 KiB
PHP
95 lines
2.7 KiB
PHP
<?php defined('BASEPATH') || exit("No direct script access allowed");
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class Lang_detect {
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private $CI;
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private $supportedLanguages = array();
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private $language = '';
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/**
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* Constructor.
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*/
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public function __construct() {
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$this->CI =& get_instance();
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$this->CI->load->config('language');
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$this->CI->load->helper('cookie');
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log_message('debug', "Lang_detect Class Initialized");
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// get list of supported languages
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$this->supportedLanguages = $this->CI->config->item('supported_languages');
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if (empty($this->language)) {
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// language not yet set: detect the user's language
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$this->language = $this->detectLanguage();
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}
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$this->CI->lang->load_gettext($this->CI->config->item('language'));
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}
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/**
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* Determine a user's language.
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*
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* Use either the URI segment's or the cookie's language code or determine
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* the best match of the browser's languages with the available languages.
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* If no match s found, the configured default language is taken.
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*
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* @return string Language directory name, e.g. 'english'
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*/
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public function detectLanguage() {
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$segment = $this->CI->input->get('lang');
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if (strlen($segment) == 2 && array_key_exists($segment, $this->supportedLanguages)) {
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$lang = $segment;
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$this->CI->session->set_userdata('language', $lang);
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}
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if ($this->CI->session->userdata('language')) {
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$lang = $this->CI->session->userdata('language');
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} else if (get_cookie('language') !== false) {
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$lang = get_cookie('language');
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} else if ($this->CI->input->server('HTTP_ACCEPT_LANGUAGE')) {
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// explode languages into an array
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$accept_langs = explode(',', $this->CI->input->server('HTTP_ACCEPT_LANGUAGE'));
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log_message('debug', 'Checking browser languages: ' . implode(', ', $accept_langs));
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// check them all, until a match is found
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foreach ($accept_langs as $lang) {
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$lang = strtolower(substr($lang, 0, 2));
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if (in_array($lang, array_keys($this->supportedLanguages))) {
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break;
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}
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}
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}
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// if no valid language has been detected, use the default
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if (empty($lang) || !in_array($lang, array_keys($this->supportedLanguages))) {
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$lang = $this->CI->config->item('default_language');
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}
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// save the selected language to avoid detecting it again
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$this->CI->session->set_userdata('language', $lang);
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// set the language config
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$this->CI->config->set_item('language', $this->supportedLanguages[$lang]['locale']);
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return $lang;
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}
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/**
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* Sets the language cookie.
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*
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* @param string $lang The language code, e.g. en
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*/
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private function setLanguageCookie($lang) {
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set_cookie($this->CI->config->item('language_cookie_name'), $lang, $this->CI->config->item('language_expiration'));
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}
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}
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/* End of file Lang_detect.php */
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/* Location: ./application/libraries/Lang_detect.php */
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