WordPress远程图片自动本地化代码亲测可用

WordPress远程图片本地化代码亲测可WordPress远程图片本地化代码亲测可用，本代码适合复制黏贴文章带图片，然后会自动下载远程图片到本地。用，本代码适合复制黏贴文章带图片，然后会自动下载远程图片到本地。支持最新WordPress 6.7.x版本

将以下代码添加到主题functions.php文件中

// 使用代码实现WordPress远程图片本地化
// 自动处理新文章/页面时的钩子
add_action('save_post', 'auto_localize_images', 10, 3);
function auto_localize_images($post_id, $post, $update) {
    // 跳过自动保存和修订版本
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return;
    if (wp_is_post_revision($post_id)) return;
    
    // 检查权限和文章类型
    if (!current_user_can('edit_post', $post_id)) return;
    if (!in_array($post->post_type, ['post', 'page'])) return;
    
    process_images($post_id, $post->post_content);
}

// 处理图片的核心函数
function process_images($post_id, $content) {
    // 正则匹配图片
    $pattern = '/<img[^>]+src=["\'](.*?)["\']/i';
    preg_match_all($pattern, $content, $matches);
    
    if (empty($matches[1])) return;
    
    // 初始化 WordPress 文件系统
    require_once(ABSPATH . 'wp-admin/includes/file.php');
    require_once(ABSPATH . 'wp-admin/includes/media.php');
    require_once(ABSPATH . 'wp-admin/includes/image.php');
    
    $upload_dir = wp_upload_dir();
    $new_content = $content;
    $home_url = home_url();
    
    foreach ($matches[1] as $url) {
        // 跳过本地图片和无效URL
        if (strpos($url, $home_url) !== false || !preg_match('/^https?:\/\//', $url)) {
            continue;
        }
        
        // 下载图片
        $response = wp_remote_get($url, [
            'timeout' => 30,
            'sslverify' => false,
            'headers' => ['Referer' => $home_url]
        ]);
        
        if (is_wp_error($response) || wp_remote_retrieve_response_code($response) !== 200) {
            continue;
        }
        
        $image_data = wp_remote_retrieve_body($response);
        if (empty($image_data)) continue;
        
        // 获取文件信息
        $filename = basename(parse_url($url, PHP_URL_PATH));
        if (empty(pathinfo($filename, PATHINFO_EXTENSION))) {
            $filename .= '.jpg';
        }
        $filename = wp_unique_filename($upload_dir['path'], $filename);
        $filepath = $upload_dir['path'] . '/' . $filename;
        
        // 保存文件
        if (file_put_contents($filepath, $image_data) === false) {
            continue;
        }
        
        // 创建附件
        $filetype = wp_check_filetype($filename);
        $attachment = [
            'guid' => $upload_dir['url'] . '/' . $filename,
            'post_mime_type' => $filetype['type'],
            'post_title' => sanitize_file_name(pathinfo($filename, PATHINFO_FILENAME)),
            'post_content' => '',
            'post_status' => 'inherit'
        ];
        
        $attach_id = wp_insert_attachment($attachment, $filepath, $post_id);
        if (!$attach_id) {
            @unlink($filepath);
            continue;
        }
        
        // 生成附件元数据
        $attach_data = wp_generate_attachment_metadata($attach_id, $filepath);
        wp_update_attachment_metadata($attach_id, $attach_data);
        
        // 替换URL
        $new_url = wp_get_attachment_url($attach_id);
        $new_content = str_replace($url, $new_url, $new_content);
    }
    
    // 更新文章内容
    if ($new_content !== $content) {
        remove_action('save_post', 'auto_localize_images');
        wp_update_post([
            'ID' => $post_id,
            'post_content' => $new_content
        ], true);
        add_action('save_post', 'auto_localize_images', 10, 3);
    }
}

// 添加后台批量处理功能
add_action('admin_menu', 'register_image_localizer_menu');
function register_image_localizer_menu() {
    add_menu_page(
        '图片本地化',
        '图片本地化',
        'manage_options',
        'image-localizer',
        'image_localizer_admin_page',
        'dashicons-images-alt2'
    );
}

function image_localizer_admin_page() {
    if (!current_user_can('manage_options')) {
        wp_die('无权限访问');
    }
    
    ?>
    <div class="wrap">
        <h1>远程图片本地化</h1>
        <form method="post">
            <?php wp_nonce_field('localize_images_action', 'localize_images_nonce'); ?>
            <p><input type="submit" name="localize_all" class="button button-primary" value="处理所有文章"></p>
        </form>
        
        <?php
        if (isset($_POST['localize_all']) && check_admin_referer('localize_images_action', 'localize_images_nonce')) {
            set_time_limit(0);
            
            $args = [
                'post_type' => ['post', 'page'],
                'posts_per_page' => 20, // 每次处理20篇，避免超时
                'post_status' => 'publish',
                'paged' => 1
            ];
            
            echo '<div id="localize-progress"><p>正在处理...</p>';
            $processed = 0;
            
            do {
                $query = new WP_Query($args);
                foreach ($query->posts as $post) {
                    process_images($post->ID, $post->post_content);
                    $processed++;
                    echo "<p>已处理文章 #{$post->ID}</p>";
                    flush();
                }
                $args['paged']++;
            } while ($query->have_posts());
            
            echo "<p>处理完成！共处理 {$processed} 篇文章。</p></div>";
        }
        ?>
    </div>
    <?php
}

// 提高执行效率
add_filter('http_request_timeout', function($timeout) {
    return 30;
});