WordPress 禁止附件页面

functions.php 添加：

function wpb_redirect_attachment_to_post() {
    if ( is_attachment() ) {
      global $post;
      if( empty( $post ) ) $post = get_queried_object();
      if ($post->post_parent) {
        $link = get_permalink( $post->post_parent );
        wp_redirect( $link, '301' );
        exit();
      }
      else {
        // What to do if parent post is not available
        wp_redirect( home_url(), '301' );
        exit();
      }
    }
}
add_action( 'template_redirect', 'wpb_redirect_attachment_to_post' );