single.php

<?php
/**
 * The template for displaying all single posts.
 *
 * @package Travel Tour
 */

get_header();

$sidebar_layout = travel_tour_get_sidebar_layout();

if( $sidebar_layout == 'no-sidebar' ) {
  $content_column_class = 'col-md-12';
} else {
  $content_column_class = 'col-md-9';
}
?>

<div class="my-64">
  <div class="container-xl">
    <div class="row"> 

      <?php if ( $sidebar_layout == 'left-sidebar' ) : ?>
        <div class="col-md-3"><?php get_sidebar(); ?></div>
      <?php endif; ?>

      <section class="d-flex flex-column <?php echo esc_attr( $content_column_class ); ?>">
        <?php while ( have_posts() ) : the_post(); ?>                    
          <?php get_template_part( 'template-parts/content', 'single' ); ?>
        <?php endwhile; // End of the loop. ?>
        <?php comments_template(); ?>
      </section> <!-- /.end of section -->  

      <?php if( $sidebar_layout == 'right-sidebar' ) : ?>
        <div class="col-md-3"><?php get_sidebar(); ?></div>
      <?php endif; ?>

    </div>
  </div>
</div>

<?php get_footer();