WordPress: Display post title, post thumbnail, and post excerpt

<?php
if ( have_posts() ) :
  while ( have_posts() ) : the_post();
  	echo '<article>';
			echo '<a href="' . get_permalink() . '">';
				the_title( '<h2 class="entry-title">','</h2>' );
      
        if (has_post_thumbnail() ) {
          // get thumbnail id for use later
        	$thumbnail_id = get_post_thumbnail_id();

	        echo '<figure>';
		      the_post_thumbnail('large');

          if ( has_excerpt( $thumbnail_id ) ) {

			     // display figcaption only if there's a caption
			      echo '<figcaption>' . get_post( $thumbnail_id )->post_excerpt . '</figcaption>';
       }

      echo '</figure>';
      } 
      
			echo '</a>';
			the_excerpt();
		echo '<article>';

	endwhile;
else :
	echo wpautop( 'No posts available' );
endif;