get post id in while loops outputting page id

by

Dont use query_posts or WP_Query if you need it in the main loop. Dont ever use query_posts anyway.

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

   <?php $current_id = get_the_ID(); ?>
   <?php echo $current_id ?>

            <h1><?php the_field('titleFart', $current_id); ?></h1>

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

Because: get_the_ID()