无需插件实现WordPress后台文章列表添加一键复制文章按钮

我们有些时候在WordPress后台编辑文章的时候希望页面和文章要复制后重新编辑,如果我们再手工复制有点效率低。这里我们可以用一些插件实现,比如Post Duplicator,这里我们直接不用插件用代码实现也可以。

        // 复制文章

        function zm_clone_post_as_draft() {

        	global $wpdb;

        	if (! ( isset( $_GET['post']) || isset( $_POST['post'])  || ( isset($_REQUEST['action']) && 'zm_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_zm_clone_post_as_draft', 'zm_clone_post_as_draft' );

     

     

        // 复制文章并添加到列表

        function zm_clone_post_link( $actions, $post ) {

        	if (current_user_can('edit_posts')) {

        		$actions['clone'] = '<a href="' . wp_nonce_url('admin.php?action=zm_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', 'zm_clone_post_link', 10, 2 );

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

这里我们丢到 functions.php 文件然后可以在文章列表可以看到复制按钮,复制后就变成草稿。我们就可以继续编辑文章。

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