禁用WordPress附件页面

/**
 * 禁用WordPress附件页面
 */
add_action('init', function() {
    // 1. 重定向附件页面
    add_action('template_redirect', function() {
        if (is_attachment()) {
            global $post;
            
            if ($post && $post->post_parent) {
                wp_redirect(get_permalink($post->post_parent), 301);
            } else {
                wp_redirect(home_url(), 301);
            }
            exit;
        }
    });
    
    // 2. 修改附件链接
    add_filter('attachment_link', function($url, $post_id) {
        return wp_get_attachment_url($post_id);
    }, 99, 2);
    
    // 3. 防止索引
    add_action('wp_head', function() {
        if (is_attachment()) {
            echo '<meta name="robots" content="noindex,nofollow" />';
        }
    }, 1);
    
    // 4. 清理重写规则
    add_filter('rewrite_rules_array', function($rules) {
        foreach ($rules as $rule => $rewrite) {
            if (strpos($rewrite, 'attachment=') !== false) {
                unset($rules[$rule]);
            }
        }
        return $rules;
    });
}, 1);