source: seo-digital-marketing/1.7/single.php

<?php
/**
 * The template for displaying all single posts
 * 
 * @subpackage SEO Digital Marketing
 * @since 1.0
 */

get_header(); ?>

<?php
        $seo_digital_marketing_post_sidebar = get_option( 'seo_digital_marketing_single_post_sidebar' );
        if ( '1' == $seo_digital_marketing_post_sidebar ) {
        $seo_digital_marketing_column = 'col-lg-12 col-md-12';
        } else { 
        $seo_digital_marketing_column = 'col-lg-8 col-md-8';
        }
?>

<main id="content" class="mt-5">
        <div class="container">
                <div class="content-area entry-content">
                        <div id="main" class="site-main" role="main">
                        <div class="row m-0">
                                <div class="content_area <?php echo esc_attr( $seo_digital_marketing_column ); ?>">
                                        <section id="post_section">
                                                        <?php
                                                        /* Start the Loop */
                                                        while ( have_posts() ) : the_post();

                                                                get_template_part( 'template-parts/post/single-page' );

                                                                // If comments are open or we have at least one comment, load up the comment template.
                                                                if ( comments_open() || get_comments_number() ) :
                                                                        comments_template();
                                                                endif;

                                                                the_post_navigation( array(
                                                                        'prev_text' => '<span class="screen-reader-text">' . __( 'Previous Post', 'seo-digital-marketing' ) . '</span><span aria-hidden="true" class="nav-subtitle">' . __( 'Previous', 'seo-digital-marketing' ) . '</span>',
                                                                        'next_text' => '<span class="screen-reader-text">' . __( 'Next Post', 'seo-digital-marketing' ) . '</span><span aria-hidden="true" class="nav-subtitle">' . __( 'Next', 'seo-digital-marketing' ) . '</span> ',
                                                                ) );

                                                        endwhile; // End of the loop.
                                                        ?>
                                                </section>
                                        </div>
                                        <?php if ( '1' != $seo_digital_marketing_post_sidebar ) {?>
                                                <div id="sidebar" class="col-lg-4 col-md-4"><?php dynamic_sidebar('sidebar-1'); ?></div>
                                        <?php } ?>
                                </div>
                        </div>
                </div>
        </div>
</main>

<?php get_footer();