如何将post标签作为类添加到自定义post类型循环中？

function create_custom_post_type() {
    register_post_type('custom_post',
        array(
            'labels' => array(
                'name' => 'Custom Posts',
                'singular_name' => 'Custom Post'
            ),
            'public' => true,
            'has_archive' => true,
            'supports' => array('title', 'editor', 'thumbnail')
        )
    );
}
add_action('init', 'create_custom_post_type');

function create_custom_taxonomy() {
    register_taxonomy(
        'custom_tag',
        'custom_post',
        array(
            'label' => 'Custom Tags',
            'rewrite' => array('slug' => 'custom-tag'),
            'hierarchical' => true
        )
    );
}
add_action('init', 'create_custom_taxonomy');

$args = array(
    'post_type' => 'custom_post',
    'posts_per_page' => 10
);

$query = new WP_Query($args);

if ($query->have_posts()) {
    while ($query->have_posts()) {
        $query->the_post();
        
        $post_tags = get_the_terms(get_the_ID(), 'custom_tag');
        $post_classes = array();
        
        if ($post_tags && !is_wp_error($post_tags)) {
            foreach ($post_tags as $tag) {
                $post_classes[] = $tag->slug;
            }
        }
        
        echo '<div class="' . implode(' ', $post_classes) . '">';
        the_title();
        echo '</div>';
    }
    
    wp_reset_postdata();
} else {
    echo 'No custom posts found.';
}