global $authordata;

此变量包含当前帖子的作者数据。

从我编写的作者数据小部件中：

global $authordata;
if ( ( is_singular() or is_author() )
    and is_object( $authordata )
    and isset ( $authordata->ID )
)
{
    return $authordata->ID;
}

要获取作者存档的链接，请执行以下操作：

get_author_posts_url( $authordata->ID );

更新这里是我自己的作者数据小部件的精简版本。非常基本，根据您的需要进行调整。别忘了我

<?php # -*- coding: utf-8 -*-
declare ( encoding = \'UTF-8\' );
/**
 * Plugin Name: T5 Author Data
 * Plugin URI:  http://wordpress.stackexchange.com/q/47418/73
 * Description: Simple Widget to display author data on singular pages (posts and pages) and author archives.
 * Version:     2012.03.31
 * Author:      Thomas Scholz <[email protected]>
 * Author URI:  http://toscho.de
 * License:     MIT
 * License URI: http://www.opensource.org/licenses/mit-license.php
 */

add_action( \'widgets_init\', array ( \'T5_Author_Data\', \'register\' ) );

/**
 * Basic Author Data Widget.
 *
 * @author Thoams Scholz http://toscho.de
 */
class T5_Author_Data extends WP_Widget
{
    /**
     * Constructor. Calls the parent constructor
     */
    public function __construct()
    {
        parent::__construct( \'t5_author_data\', \'Author Data\' );
    }

    /**
     * Display the content on front.
     *
     * @see WP_Widget::widget()
     */
    public function widget( $args, $instance )
    {
        // Set up $before_title, $after_title, $before_widget and $after_widget.
        extract( $args );

        global $authordata;
        if ( ! ( is_author() or is_singular() ) // wrong page
            or ! is_object( $authordata )       // wrong type
            or ! isset ( $authordata->ID )      // wrong object
            )
        {
            return; // Nothing to do.
        }

        // Build the title.
        $name = esc_html( $authordata->display_name );

        // Important! Never omit this filter in your widgets.
        $name = apply_filters( \'widget_title\', $name, $instance, $this->id_base );

        // Link to archive.
        ! is_author() and $name = sprintf(
            \'<a href="%1$s" rel="author">%2$s</a>\',
            get_author_posts_url( $authordata->ID ),
            $name
        );
        $title = $before_title . $name . $after_title;

        // Description.
        // See http://wordpress.stackexchange.com/a/43742/73 for a rich text
        // editor option as an alternative.
        $desc = trim( get_the_author_meta( \'description\', $authordata->ID ) );
        \'\' !== $desc and $desc = \'<div class="author-text">\' . wpautop( $desc ) . \'</div>\';

        // Image
        $img = get_avatar( $authordata->ID, $size = 32 );

        // Now we have everything we need.
        print $before_widget
            . $title
            . "<div class=\'author-image\'>$img</div>"
            . "<div class=\'author-text\'>$desc</div>"
            . $after_widget
        ;
    }

    /**
     * Handler for backend wp-admin/widget.php.
     *
     * @see WP_Widget::form()
     */
    public function form( $instance )
    {
        printf(
            \'<p class="no-options-widget">%s</p>\',
            __( \'There are no options for this widget.\' )
        );
    }

    /**
     * Register this widget.
     *
     * @wp-hook widgets_init
     */
    public static function register()
    {
        register_widget( __CLASS__ );
    }
}