WordPress 后台文章列表中,如果能直接复制一篇文章或页面,然后重新编辑后发表,是不是很方便。那为什么不全选复制文章内容,然后粘贴到新建文章中呢?这是因为这样做仅复制了文章内容,并未同时把原文章的相关信息一同复制过去,比如一些自定义字段等。

利用本文的一段代码,可以实现快速复制克隆一份文章,并保留原文章的所有信息。

将代码添加到当前主题函数模板 functions.php 中:

// 复制文章
function clone_post_as_draft() {
	global $wpdb;
	if (! ( isset( $_GET['post']) || isset( $_POST['post'])  || ( isset($_REQUEST['action']) && 'clone_post_as_draft' == $_REQUEST['action'] ) ) ) {
		wp_die('No post to clone has been supplied!');
	}
 
	//  Nonce 验证
	if ( !isset( $_GET['clone_nonce'] ) || !wp_verify_nonce( $_GET['clone_nonce'], basename( __FILE__ ) ) )
	return;
 
	// 获取原文章ID
	$post_id = (isset($_GET['post']) ? absint( $_GET['post'] ) : absint( $_POST['post'] ) );
 
	// 所有文章数据
	$post = get_post( $post_id );
 
	// 如果不希望当前用户作为新文章作者,将下两行替换为$new_post_author = $post->post_author;
	$current_user = wp_get_current_user();
	$new_post_author = $current_user->ID;
 
	// 如果发布数据存在,则创建发布克隆
	if (isset( $post ) && $post != null) {
 
	// 创建新文章数组
		$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
		);
 
		// 通过wp_insert_post() 函数添加文章
		$new_post_id = wp_insert_post( $args );
 
		// 将新的文章设置为草稿
		$taxonomies = get_object_taxonomies($post->post_type); // 返回文章类型的分类数组,例如: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);
		}
 
		// 查询复制所有文章信息 post meta
		$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;
				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);
		}
		wp_redirect( admin_url( 'edit.php?post_type='.$post->post_type ) );
		exit;
	} else {
		wp_die('Post creation failed, could not find original post: ' . $post_id);
	}
}
add_action( 'admin_action_clone_post_as_draft', 'clone_post_as_draft' );
 
 
// 复制文章并添加到列表
function clone_post_link( $actions, $post ) {
	if (current_user_can('edit_posts')) {
		$actions['clone'] = '<a href="' . wp_nonce_url('admin.php?action=clone_post_as_draft&post=' . $post->ID, basename(__FILE__), 'clone_nonce' ) . '" title="Clone this '.$post->post_type.'" rel="permalink">复制</a>';
	}
	return $actions;
}
 
add_filter( 'post_row_actions', 'clone_post_link', 10, 2 );
add_filter('page_row_actions', 'clone_post_link', 10, 2);

之后,进入WP后台 → 文章 → 所有文章,在文章标题下面会增加“复制”按钮,点击后会复制一份完全相同、状态为草稿的文章,同时支持页面及自定义文章类型。

如果不想使用代码。可以安装使用相似功能的插件:Post DuplicatorYoast Duplicate Post

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