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在给wordpress添加内容时，有时会遇到文章复制的功能，但是wordpress又没有这个功能。把下面一段代码添加到functions.php文件中，就可以实现这个功能。

/** Function for post duplication. Dups appear as drafts. User is redirected to the edit 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!');}/** 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();$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;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_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="' . wp_nonce_url('admin.php?action=rd_duplicate_post_as_draft&post=' . $post->ID, basename(__FILE__), 'duplicate_nonce' ) . '" title="Duplicate this item" rel="permalink">Duplicate</a>';}return $actions;
}
add_filter( 'post_row_actions', 'rd_duplicate_post_link', 10, 2 );

添加完代码后，就会有后台文章管理列表中，鼠标移到标题上时，就会看到出现Duplicate管理标签。点击这个标题就会实现对该文章的复制。

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https://www.zhanyes.com/code/5995.html