tag list in tag archive

add_filter('the_tags','the_tags_in_tag_archive');
/*filter to replicate 'the_tags()' in a tag archive, to un-link the current tag in the list
* alchymyth 2011
*/
function the_tags_in_tag_archive($list) {
if( is_tag() ) : //do the following only in tag archives
global $post;
$this_tag = get_query_var('tag');
//retrieve the $before,$sep,$after variables from the list
$before = explode('<a href', $list);
$before = $before[0];
$afters = explode('</a>', $list);
$after = array_pop($afters);
$separator = explode('<a href', $afters[1]);
$separator = $separator[0];
$sep = '';
//get the post tags
$posttags = get_the_tags($post->ID);
    if($posttags) :
    //build new tag list
    $list = $before;
        foreach( $posttags as $tag ) {
            $list .= $sep;
            if( $tag->slug != $this_tag ) $list .= '<a href="' . get_tag_link( $tag->term_id) . '">';
            $list .= $tag->name;
            if( $tag->slug != $this_tag ) $list .= '</a>';
            $sep = $separator;
        }
    $list .= $after;
    endif;
endif; //end of is_tag()
return $list;
}