page.php

<?php get_header('', array( 'body-classes' => '') ); ?>

<main>

<?php while ( have_posts() ) : the_post(); ?>

<header>

<h1><?php the_title(); ?></h1>

<?php if (!class_exists('ACF')): ?>

<!-- display raw post_meta, if ACF not installed & activated -->
<?php if ( get_post_meta( get_the_ID(), 'lead_in_copy', true ) ) : ?>
<p><?php echo get_post_meta( get_the_ID(), 'lead_in_copy', true ); ?></p>
<?php endif; ?>

<?php else : ?>

<!-- display ACF field, if ACF installed & activated -->
<?php if ( get_field('lead_in_copy') ) : ?>
<p><?php the_field('lead_in_copy'); ?></p>
<?php endif; ?>

<?php endif; ?>

</header>


<?php if (get_field('display_sidebar')) : ?>

<?php get_sidebar(); ?>

<?php endif; ?>


<div class="content">

    <?php the_content(); ?>

</div>

<?php endwhile; // end of the loop. ?>

</main>

<?php get_footer(); ?>