如何在 WordPress 中复制/克隆页面或文章

当我们需要大部分相同的格式、标签、分类、自定义字段、SEO 数据等时，我们需要复制页面或文章功能。在本教程中，我们将学习如何在 WordPress 中复制页面或文章。我们可以使用插件或不使用插件来做到这一点。

因此，我们将在文章列表或页面列表页面上创建一个锚链接，当我们单击该链接时，它将创建一个具有相同内容的新文章并将其保存为草稿。

但是如果没有复制功能，您必须一一检查所有字段并制作另一个新文章。

让我们开始吧！

/*
* 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' );

/*
 * 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="'%20.%20wp_nonce_url('admin.php?action=duplicate_post_or_page&post='%20.%20%24post->ID,%20basename(__FILE__),%20'duplicate_nonce'%20)%20.%20'" title="Duplicate this item" rel="permalink">Duplicate</a>';
	}
	return $actions;
}
 
add_filter( 'post_row_actions', 'duplicate_post_link', 10, 2 );

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

效果如下所示：

总结

在本教程中，我们介绍了使用插件或代码实现文章/页面一键复制的功能，希望对大家有所帮助。如果您有任何问题，请在下面评论。