WordPress 后台直接复制文章并设置状态为草稿

在 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。l

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 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);