A veces puedes verte en la necesidad de añadir la función de duplicar posts y páginas en WordPress y para ello usar plugins como Duplicate Post.
Pero si eres de los que quieres usar con frecuencia esta funcionalidad y evitar el uso de plugins (en la medida que sea posible) puedes usar el siguiente snippet en el archivo functions.php de tu tema para añadir la función de duplicar posts y páginas sin plugin en WordPress.
/* * Function creates post duplicate as a draft and redirects then to the edit post screen */ function rd_duplicate_post_as_draft(){ global $wpdb; if (! ( isset( $_GET['post']) || isset( $_POST['post']) || ( isset($_REQUEST['action']) && 'rd_duplicate_post_as_draft' == $_REQUEST['action'] ) ) ) { wp_die('No post to duplicate has been supplied!'); } /* * get the original post id */ $post_id = (isset($_GET['post']) ? $_GET['post'] : $_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(); $new_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' => $new_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); // returns array of taxonomy names for post type, ex array("category", "post_tag"); 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_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id"); if (count($post_meta_infos)!=0) { $sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) "; foreach ($post_meta_infos as $meta_info) { $meta_key = $meta_info->meta_key; $meta_value = addslashes($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_rd_duplicate_post_as_draft', 'rd_duplicate_post_as_draft' ); /* * Add the duplicate link to action list for post_row_actions */ function rd_duplicate_post_link( $actions, $post ) { if (current_user_can('edit_posts')) { $actions['duplicate'] = '<a href="admin.php?action=rd_duplicate_post_as_draft&post=' . $post->ID . '" title="Duplicate this item" rel="permalink">Duplicar</a>'; } return $actions; } add_filter( 'post_row_actions', 'rd_duplicate_post_link', 10, 2 ); add_filter( 'page_row_actions', 'rd_duplicate_post_link', 10, 2); /* for pages */ add_filter( 'portfolio_row_actions', 'rd_duplicate_post_link', 10, 2); /* a custom post called portfolio */
Fuente: timbdesign.com