使用例

// CSS 部のみを出力します
$css = $tags->buildCSS();
// html 部のみを出力します
$taghtml = $tags->buildHTML();

class MyTags extends HTML_TagCloud
{
    protected $epocLevel = array(
        array(
            'earliest' => array(
                'link'    => 'ffdfdf',
                'visited' => 'ffdfdf',
                'hover'   => 'ffdfdf',
                'active'  => 'ffdfdf',
            ),
        ),
        array(
            'earlier' => array(
                'link'    => 'ff7f7f',
                'visited' => 'ff7f7f',
                'hover'   => 'ff7f7f',
                'active'  => 'ff7f7f',
            ), 
        ),
        array(
            'previous' => array(
                'link'    => 'ff7f7f',
                'visited' => 'ff7f7f',
                'hover'   => 'ff7f7f',
                'active'  => 'ff7f7f',
            ), 
        ),
        array(
            'recent' => array(
                'link'    => 'ff4f4f',
                'visited' => 'ff4f4f',
                'hover'   => 'ff4f4f',
                'active'  => 'ff4f4f',
            ), 
        ),
        array(
            'later' => array(
                'link'    => 'ff1f1f',
                'visited' => 'ff1f1f',
                'hover'   => 'ff1f1f',
                'active'  => 'ff1f1f',
            ),
        ),
        array(
            'latest' => array(
                'link'    => 'ff0000',
                'visited' => 'ff0000',
                'hover'   => 'ff0000',
                'active'  => 'ff0000',
            ),
        ),
    );
    protected $size_suffix = 'pt';
    protected $fontsizerange = 0;
    protected $basefontsize = 12;
}

$tags->addElement('PHP','http://www.php.net', 39);