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WordPress WordPress Theme Development Custom Post Type Templates in WordPress The Portfolio Homepage

Thumbnails not showing

I cannot see the issue - can someone help please.

<?php

/* Template Name: Portfolio Page */ ?>

<?php get_header(); ?>

<section class="row"> <div class="small-12 columns text-center"> <div class="leader">

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

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

      <?php endwhile; endif; ?>

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

<?php

$args = array( 'post_type' => 'portfolio' ); $query = new WP_Query( $args );

?>

<section class="row no-max pad">

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

  <div class="small-6 medium-4 large-3 columns grid-item">
    <a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('large'); ?></a>
  </div>

  <?php endwhile; endif; wp_reset_postdata(); ?>

</section>

<?php get_footer(); ?>

For thumbnail it should just add this line to functions.php on the top

add_theme_support( 'post-thumbnails' );