WP/CP | Type: PHPShow Tags for Only One Category

Decided not to do this on a project after finding this snippet, but kept the snippet just in case.

query_posts('category_name=news'); if (have_posts()) : while (have_posts()) : the_post(); //replace 'news' with preferred category

    $posttags = get_the_tags();

    if ($posttags) {
        foreach($posttags as $tag) {
            $all_tags[] = $tag -> name;
        }
    }
    endwhile; endif; 

    //This snippet removes any duplicates.
    $tags_unique = array_unique($all_tags); 

    echo '

<ul>';
        foreach($tags_unique as $unique) {
          echo  '
	
	<li>'.$unique.'</li>

';
        }
    echo '</ul>

';

wp_reset_query();