WordPress at a glance
function is not described

WP_Widget_Meta::widget() WP 2.8.0

Outputs the content for the current Meta widget instance.

This is a method of the class: WP_Widget_Meta

Hooks from the method
Return

Null. Nothing.

Usage

$WP_Widget_Meta = new WP_Widget_Meta();
$var = $WP_Widget_Meta->widget( $args, $instance );
$args(array) (required)
Display arguments including 'before_title', 'after_title', 'before_widget', and 'after_widget'.
$instance(array) (required)
Settings for the current Meta widget instance.

Changelog

Since 2.8.0 Introduced.

Code of WP Widget Meta::widget: wp-includes/widgets/class-wp-widget-meta.php WP 5.2.4

<?php
public function widget( $args, $instance ) {
	$title = ! empty( $instance['title'] ) ? $instance['title'] : __( 'Meta' );

	/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
	$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

	echo $args['before_widget'];

	if ( $title ) {
		echo $args['before_title'] . $title . $args['after_title'];
	}
	?>
		<ul>
		<?php wp_register(); ?>
		<li><?php wp_loginout(); ?></li>
		<li><a href="<?php echo esc_url( get_bloginfo( 'rss2_url' ) ); ?>"><?php _e( 'Entries <abbr title="Really Simple Syndication">RSS</abbr>' ); ?></a></li>
		<li><a href="<?php echo esc_url( get_bloginfo( 'comments_rss2_url' ) ); ?>"><?php _e( 'Comments <abbr title="Really Simple Syndication">RSS</abbr>' ); ?></a></li>
		<?php
		/**
		 * Filters the "Powered by WordPress" text in the Meta widget.
		 *
		 * @since 3.6.0
		 * @since 4.9.0 Added the `$instance` parameter.
		 *
		 * @param string $title_text Default title text for the WordPress.org link.
		 * @param array  $instance   Array of settings for the current widget.
		 */
		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' )
			),
			$instance
		);

		wp_meta();
		?>
		</ul>
		<?php

		echo $args['after_widget'];
}