hp/page.php

<?php get_header();?>
<div id="content" class="site-content">
  <div class="container">
    <div class="row">
      <div class="col-lg-3">
        <div class="hp-sidenav navbar sticky-md-top pt-sm-3" role="navigation">
          <div class="navbars-collapse">
            <div class="flex-column list-group-flush">
              <li class="<?php if ( is_page() && !$post->post_parent ) echo 'current_nav-item'; ?> nav-item list-group-item py-1 p-0">
                <a href="<?php echo get_permalink( $post->post_parent ); ?>" >
                  <?php echo get_the_title( $post->post_parent ); ?>
                </a>
              </li>
             <?php echo boot23_list_child_pages(); ?>
            </div>
          </div>
        </div>
      </div>
      <section id="primary" class="content-area col-lg-9 col-md-12">
        <div id="main" class="site-main" role="main">
        <?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>
          <article id="post-<?php the_ID(); ?>" <?php post_class(); ?>>
            <header class="entry-header">
              <?php the_title( '<h1 class="entry-title">', '</h1>' ); ?>
            </header>
            <div class="post-thumbnail">
              <?php the_post_thumbnail(); ?>
            </div>
            <div class="entry-content">
              <?php the_content(); ?>
            </div>
            <div class="meta text-end mb-5">
              <small><i class="bi-alarm"></i> <?php the_modified_time('Y/m/d'); edit_post_link( __( 'edit', 'textdomain' ), ' ( ', ' )' );?></small>
            </div>
          </article>
        <?php endwhile; ?>
        </div>
      </section>
    </div>
  </div>
</div>
<?php get_footer();?>