如何在CodeIgniter中将Cookie语言值追加到URL并实现跳转

Let's break down how to implement your required functionality using CodeIgniter, building on your existing code.

1. Add Language Detection & Redirect Logic #

First, we need to check for the language cookie on page load, and if it doesn't exist, fall back to the Accept-Language header to determine the user's preferred language. Add this logic to your home controller's index method (or a base controller constructor if you want it site-wide):

public function index() {
    // Check if language cookie exists
    $lang_cookie = $this->input->cookie('language');
    
    if ($lang_cookie) {
        // Map cookie value to URL path
        $lang_map = [
            'english' => 'en',
            'deutch' => 'de'
            // Add more language mappings here as needed
        ];
        
        $target_lang = isset($lang_map[$lang_cookie]) ? $lang_map[$lang_cookie] : 'en'; // Default to English
        redirect(base_url($target_lang));
    } else {
        // Fallback to Accept-Language header
        $accept_lang = $this->input->server('HTTP_ACCEPT_LANGUAGE');
        if ($accept_lang) {
            // Parse the Accept-Language header (simplified example)
            $langs = explode(',', $accept_lang);
            $preferred_lang = strtolower(substr($langs[0], 0, 2)); // Get first 2 chars (e.g., 'en', 'de')
            
            // Map short code to your language folder names
            $code_map = [
                'en' => 'english',
                'de' => 'deutch'
                // Add more mappings here
            ];
            
            $target_folder = isset($code_map[$preferred_lang]) ? $code_map[$preferred_lang] : 'english'; // Default
            
            // Set the cookie for future visits
            $cookie = array(
                'name' => 'language',
                'value' => $target_folder,
                'expire' => '31536000',
            );
            $this->input->set_cookie($cookie);
            
            // Redirect to the corresponding language URL
            redirect(base_url($preferred_lang));
        } else {
            // No cookie or Accept-Language, redirect to default
            redirect(base_url('en'));
        }
    }
    
    // Rest of your index method code...
}

2. Update the Language Controller #

Your existing language controller sets the cookie but redirects back to the referrer. We need to adjust it to redirect to the correct language URL instead:

public function language($lang = false) {
    $folder = 'application/language/';
    $languagefiles = scandir($folder);
    
    if (in_array($lang, $languagefiles)) {
        $cookie = array(
            'name' => 'language',
            'value' => $lang,
            'expire' => '31536000',
        );
        $this->input->set_cookie($cookie);
        
        // Map the language folder to URL path
        $lang_map = [
            'english' => 'en',
            'deutch' => 'de'
        ];
        $target_path = isset($lang_map[$lang]) ? $lang_map[$lang] : 'en';
        redirect(base_url($target_path));
    } else {
        // Invalid language, redirect to default
        redirect(base_url('en'));
    }
}

3. Adjust the View Code (Minor Tweaks) #

Your view code is mostly good, but we can clean up the image source logic for readability:

<h5>Translate this page:</h5>
<div class="lang-holder">
    <a href="#" class="topbar-menu-toggle" data-toggle="button">
        <?php
        // Get current language from cookie or default
        $current_lang = $this->input->cookie('language') ?: $this->settings_lib->item('site.default_language');
        ?>
        <img src="<?php echo base_url('assets/img/lang/' . $current_lang . '.png'); ?>">
    </a>
</div>
<div id="topbar-dropmenu" class="animated animated-short slideInDown">
    <div class="topbar-menu row">
        <?php if ($handle = opendir('application/language/')): ?>
            <?php while (false !== ($entry = readdir($handle))): ?>
                <?php if ($entry != "." && $entry != ".."): ?>
                    <div class="col-xs-2 col-sm-1">
                        <a href="<?php echo base_url('home/language/' . $entry); ?>">
                            <img class="h30" src="<?php echo base_url('assets/img/lang/' . $entry . '.png'); ?>">
                            <span class="fs14 hidden-xs"><?php echo ucfirst($entry); ?></span>
                        </a>
                    </div>
                <?php endif; ?>
            <?php endwhile; ?>
            <?php closedir($handle); ?>
        <?php endif; ?>
    </div>
</div>

Key Notes #

• Language Mapping: Make sure the lang_map arrays in both controllers match your cookie values to URL paths (e.g., english → en, deutch → de). Add more entries as you support additional languages.
• Accept-Language Parsing: The example uses a simplified parsing of the header. For more robust handling, you could parse the quality values (e.g., en-US;q=0.8) if needed.
• Default Language: Always set a default language (like English) to fall back on when no cookie or Accept-Language header is available.

内容的提问来源于stack exchange，提问作者Bunty Kumar Sharma