Add term list as class

Question

I am trying to add a list of terms as a class for custom post types.

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

                    <?php $categories = get_the_terms($post->ID, 'project_type');
                        foreach($categories as $category){

                            return $category->name;
                        }
                    ?> 


                    <div class='portfolio-tile <?php echo $category ;?>'>
                        <?php the_post_thumbnail('medium' ); ?>

                    </div>

                <?php endwhile; ?>

                </div>

        <?php wp_reset_query(); ?>

Answer 1

If you use return then your loop will not work properly. You can try the code this way:

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

                    <?php $term_class = ''; 
                        $categories = get_the_terms($post->ID, 'project_type');
                        foreach($categories as $category){

                            $term_class .= ' ' . $category->name;
                        }
                    ?> 


                    <div class='portfolio-tile <?php echo trim($term_class) ;?>'>
                        <?php the_post_thumbnail('medium' ); ?>

                    </div>

                <?php endwhile; ?>

                </div>

        <?php wp_reset_query(); ?>

Answer 2

I found that the best way to handle this problem was to leverage the post_class function and add the loop through the function.php file. this is the code in the function.php file:

function term_class($classes){

global $post;

$taxonomies = array('project_type');
$terms = get_the_terms( $post->ID , $taxonomies);

 foreach ($terms as $term) {
    $classes[] = $term->name;
 }

 return $classes;

}

add_filter( 'post_class', 'term_class' );
add_filter( 'body_class', 'term_class' );

Then I just added the post_class() function the custom posts template. Thanks for all the help everyone.