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Question

I've made a custom metabox that if selected makes the post thumbnail the background of the site.

Now I need that this post thumbnail has a link to the post.

< ?php query_posts ('showposts=5$cat=2'); if (have_posts()) : ?>

                    if ( has_post_thumbnail() && get_post_meta($post->ID, 'dbt_checkbox', true) ) {
                        the_post_thumbnail('background');
                    }
                    else {}
                ?>

            <?php endwhile; endif; ?>

Answer 1

Wordpress documentation provides an example for this exact situation

<?php if ( has_post_thumbnail() ) : ?>
    <a href="<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
    <?php the_post_thumbnail(); ?>
    </a>
<?php endif; ?>

However, I kind of hate opening and closing php tags so lightly. I'll try something to improve this answer.

Edit: got it. Please try this:

if ( has_post_thumbnail() && get_post_meta($post->ID, 'dbt_checkbox', true) ) {
    echo  '<a href="' . get_permalink( $post->ID ) . '" >';
    echo  get_the_post_thumbnail( $post->ID, 'background' );
    echo '</a>';
}