WP_Widget_Recent_Posts::widget( array $args, array $instance )

	public function widget( $args, $instance ) {
		if ( ! isset( $args['widget_id'] ) ) {
			$args['widget_id'] = $this->id;
		}

		$title = ( ! empty( $instance['title'] ) ) ? $instance['title'] : __( 'Recent Posts' );

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

		$number = ( ! empty( $instance['number'] ) ) ? absint( $instance['number'] ) : 5;
		if ( ! $number ) {
			$number = 5;
		}
		$show_date = isset( $instance['show_date'] ) ? $instance['show_date'] : false;

		/**
		 * Filters the arguments for the Recent Posts widget.
		 *
		 * @since WP-3.4.0
		 * @since WP-4.9.0 Added the `$instance` parameter.
		 *
		 * @see WP_Query::get_posts()
		 *
		 * @param array $args     An array of arguments used to retrieve the recent posts.
		 * @param array $instance Array of settings for the current widget.
		 */
		$r = new WP_Query( apply_filters( 'widget_posts_args', array(
			'posts_per_page'      => $number,
			'no_found_rows'       => true,
			'post_status'         => 'publish',
			'ignore_sticky_posts' => true,
		), $instance ) );

		if ( ! $r->have_posts() ) {
			return;
		}
		?>
		<?php echo $args['before_widget']; ?>
		<?php
		if ( $title ) {
			echo $args['before_title'] . $title . $args['after_title'];
		}
		?>
		<ul>
			<?php foreach ( $r->posts as $recent_post ) : ?>
				<?php
				$post_title = get_the_title( $recent_post->ID );
				$title      = ( ! empty( $post_title ) ) ? $post_title : __( '(no title)' );
				?>
				<li>
					<a href="<?php the_permalink( $recent_post->ID ); ?>"><?php echo $title ; ?></a>
					<?php if ( $show_date ) : ?>
						<span class="post-date"><?php echo get_the_date( '', $recent_post->ID ); ?></span>
					<?php endif; ?>
				</li>
			<?php endforeach; ?>
		</ul>
		<?php
		echo $args['after_widget'];
	}