检查Codeigniter中的当前语言

$current_language = $this->config->item('language');

if ($this->session->userdata('language')) {
    $current_language = $this->session->userdata('language');
} elseif ($this->input->cookie('language')) {
    $current_language = $this->input->cookie('language');
} else {
    $current_language = $this->config->item('language');
}

$current_language = $this->uri->segment(1); // 假设语言代码是URL的第一个段

class Language_switcher extends CI_Controller {

    public function __construct() {
        parent::__construct();
        $this->load->helper('url');
        $this->load->library('session');
    }

    public function switch_language($language = "") {
        if ($language != "") {
            $this->session->set_userdata('language', $language);
        }
        redirect($_SERVER['HTTP_REFERER']);
    }

    public function current_language() {
        if ($this->session->userdata('language')) {
            return $this->session->userdata('language');
        } else {
            return $this->config->item('language');
        }
    }
}