WordPress 一键复制页面

// 一键复制模块


/*
* Function creates post duplicate as a draft and redirects then to the edit post screen
*/
function duplicate_post_or_page()
{
  global $wpdb;
  if (!(isset($_GET['post']) || isset($_POST['post'])  || (isset($_REQUEST['action']) && 'duplicate_post_or_page' == $_REQUEST['action']))) {
    wp_die('No post to duplicate has been supplied!');
  }

  /*
   * Nonce verification
   */
  if (!isset($_GET['duplicate_nonce']) || !wp_verify_nonce($_GET['duplicate_nonce'], basename(__FILE__)))
    return;

  /*
   * get the original post id
   */
  $post_id = (isset($_GET['post']) ? absint($_GET['post']) : absint($_POST['post']));
  /*
   * and all the original post data then
   */
  $post = get_post($post_id);

  /*
   * if you don't want current user to be the new post author,
   * then change next couple of lines to this: $new_post_author = $post->post_author;
   */
  $current_user = wp_get_current_user();
  $post_author = $current_user->ID;

  /*
   * if post data exists, create the post duplicate
   */
  if (isset($post) && $post != null) {

    /*
       * new post data array
       */
    $args = array(
      'comment_status' => $post->comment_status,
      'ping_status'    => $post->ping_status,
      'post_author'    => $post_author,
      'post_content'   => $post->post_content,
      'post_excerpt'   => $post->post_excerpt,
      'post_name'      => $post->post_name,
      'post_parent'    => $post->post_parent,
      'post_password'  => $post->post_password,
      'post_status'    => 'draft',
      'post_title'     => $post->post_title,
      'post_type'      => $post->post_type,
      'to_ping'        => $post->to_ping,
      'menu_order'     => $post->menu_order
    );

    /*
       * insert the post by wp_insert_post() function
       */
    $new_post_id = wp_insert_post($args);

    /*
       * get all current post terms ad set them to the new post draft
       */
    $taxonomies = get_object_taxonomies($post->post_type);
    foreach ($taxonomies as $taxonomy) {
      $post_terms = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'slugs'));
      wp_set_object_terms($new_post_id, $post_terms, $taxonomy, false);
    }

    /*
       * duplicate all post meta just in two SQL queries
       */
    $post_meta = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id");
    if (count($post_meta) != 0) {
      $sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
      foreach ($post_meta as $meta_info) {
        $meta_key = $meta_info->meta_key;
        if ($meta_key == '_wp_old_slug') continue;
        $meta_value = addslashes($meta_info->meta_value);
        $sql_query_sel[] = "SELECT $new_post_id, '$meta_key', '$meta_value'";
      }
      $sql_query .= implode(" UNION ALL ", $sql_query_sel);
      $wpdb->query($sql_query);
    }


    /*
       * finally, redirect to the edit post screen for the new draft
       */
    wp_redirect(admin_url('post.php?action=edit&post=' . $new_post_id));
    exit;
  } else {
    wp_die('Post creation failed, could not find original post: ' . $post_id);
  }
}
add_action('admin_action_duplicate_post_or_page', 'duplicate_post_or_page');


// 一键复制链接


/*
 * Add the duplicate link to the action list for post_row_actions
 */
function duplicate_post_link($actions, $post)
{
  if (current_user_can('edit_posts')) {
    $actions['duplicate'] = '<a href="' . wp_nonce_url('admin.php?action=duplicate_post_or_page&post=' . $post->ID, basename(__FILE__), 'duplicate_nonce') . '" title="克隆这个' . $post->post_type . '" rel="permalink">复制</a>';
  }
  return $actions;
}

add_filter('post_row_actions', 'duplicate_post_link', 10, 2);


// 一件复制页面


add_filter('page_row_actions', 'duplicate_post_link', 10, 2);