echo apply_filters( 'widget_meta_poweredby', sprintf( '<li><a href="%s" title="%s">%s</a></li>',
				esc_url( __( 'https://wordpress.org/' ) ),
				esc_attr__( 'Powered by WordPress, state-of-the-art semantic personal publishing platform.' ),
				_x( 'WordPress.org', 'meta widget link text' )
			) );

将D:\Program Files\phpstudy\WWW\wordpress\wp-includes\widgets\class-wp-widget-meta.php这段代码注释掉即可