single.php

<?php get_header(); ?>
<!-- Main -->
<div id="main">

	<!-- Post -->
	<section class="post">
		<?php  
			if ( have_posts() ) : 
				while ( have_posts() ) : the_post();
		?>
		<header class="major">
			<span class="date"><?php echo get_the_date('M d, Y') ?></span>
			<h1><?php the_title(); ?></h1>
		</header>
		<div class="image main">
			<?php  
				if ( has_post_thumbnail() ) {
					the_post_thumbnail( '', ['alt'	=> get_the_title()] );
				} else {
					echo '<img src="'. get_theme_file_uri() .'/images/pic02.jpg" alt="'. get_the_title() .'" />';
				}
			?>
		</div>
		<?php 
				the_content();
				the_tags( __( '<b>Tags: </b>', 'massively' ), ', ', '' );

				if ( !post_password_required() ) {
					$defaults = array(
						'before'	=> '<div class="link-pages">'. __( 'Pages: ', 'massively' ),
						'after'		=> '</div>'
					);
					wp_link_pages( $defaults );
				}
				endwhile;
			endif;?>
	</section>
	<?php if ( comments_open() || get_comments_number() ) : ?>
		<section>
			<?php comments_template(); ?>
		</section>
	<?php endif; ?>
</div>
<?php get_footer(); ?>