Vermemişmiyim bunu yav
özür.. ben ekledim diye hatırlıyordum
demo :
Etiket Bulutu

<?php 
header('Content-type: text/html; charset="iso-8859-9"', true);


$host = "localhost";
$username = "root";
$password = " şifre";
$table_name = " db ";

$dbh=mysql_connect ($host, $username, $password) or die ('I cannot connect to the database because: ' . mysql_error());
mysql_select_db ($table_name);

function dost_Linkler($url)
{
   $url = trim($url);
   $url = strtolower($url);

   $find = array('<b>', '</b>');
   $url = str_replace ($find, '', $url);

   $url = preg_replace('/<(\/{0,1})img(.*?)(\/{0,1})\>/', 'image', $url);

   $find = array('ı','İ');
   $url = str_replace($find, 'i', $url);
   
   $find =array('Ş','ş');
    $url = str_replace ($find, 's', $url);
   $find = array(' ', '&quot;', '&amp;', '&', '\r\n', '\n', '/', '\\', '+', '<', '>');
   $url = str_replace ($find, '-', $url);

   $find = array('é', 'è', 'ë', 'ê', 'É', 'È', 'Ë', 'Ê');
   $url = str_replace ($find, 'e', $url);

   $find = array('í', 'i', 'ì', 'î', 'ï', 'ı', 'I', 'I', 'Í', 'Ì', 'Î', 'Ï', 'İ');
   $url = str_replace ($find, 'i', $url);

   $find = array('ó', 'ö', 'Ö', 'ò', 'ô', 'Ó', 'Ò', 'Ô');
   $url = str_replace ($find, 'o', $url);

   $find = array('á', 'ä', 'â', 'à', 'â', 'Ä', 'Â', 'Á', 'À', 'Â');
   $url = str_replace ($find, 'a', $url);

   $find = array('ú', 'ü', 'Ü', 'ù', 'û', 'Ú', 'Ù', 'Û');
   $url = str_replace ($find, 'u', $url);

   $find = array('ç', 'Ç');
   $url = str_replace ($find, 'c', $url);

   $find = array('s', 'ş', 'S', 'Ş');
   $url = str_replace ($find, 's', $url);

   $find = array('g', 'ğ', 'G', 'Ğ');
   $url = str_replace ($find, 'g', $url);

   $find = array('/[^a-z0-9\-<>]/', '/[\-]+/', '/<[^>]*>/');

   $repl = array('', '-', '');

   $url = preg_replace ($find, $repl, $url);
   $url = str_replace ('--', '-', $url);

   return $url;
}


//etiketleri alacağınız tabloyu seçin 
//altta $r[e_tr]; war orda e_tr ye etiketleri tabloda hangi field dan alıyorsanız işte onu yazın... 

$q = mysql_query("select * from etiketler order by rand() ");
$etk= "";
if(mysql_num_rows($q) > 0) {
while ($r = mysql_fetch_array($q) ) {
$etk.= str_replace(" ", "_", $r[e_tr])." ";
}
}

// Etiket Arrayımız
$etiketArray = array(); 
 
// kelimeler
$etiketler = $etk;
 
// kelimeleri say
foreach( str_word_count( $etiketler, 1, 'ıİüÜöÖğĞşŞçÇ1234567890' ) as $etiket )
{
    // Tekrarlanmayı silip saymayı attır
    array_key_exists( $etiket, $etiketArray ) ? $etiketArray[ $etiket ]++ : $etiketArray[ $etiket ] = 0;
}
 
// ==============================================================
// = Bulutla Fonksiyonumuz                                      =
// ==============================================================
function bulutla( $etiketArray, $enDusukFont = 12, $enYuksekFont = 30 )
{
    $minSay = min( array_values( $etiketArray ) );
    $maxSay = max( array_values( $etiketArray ) );
    $spread       = $maxSay - $minSay;
 
    $bulutArray  = array();
 
    $spread == 0 && $spread = 1;
 
    foreach( $etiketArray as $etiket => $say )
    {
        $size = $enDusukFont + ( $say - $minSay ) 
            * ( $enYuksekFont - $enDusukFont ) / $spread;
        $bulutArray[] = '<a style="font-size: ' . floor ( $size ) . 'px' 
        . '" class="tag_cloud" href="http://siteniz.com/etiket/' . dost_Linkler($etiket) 
        . '" title="\'' . $etiket  . '\' toplam bulunan ' . $say . '">' 
        .  str_replace("_", " ", $etiket) . '</a>';
    }
 
    return join( "\n", $bulutArray ) . "\n";
}    
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-9" />
    <title>Etiket Bulutu</title>
    <style type="text/css" media="screen">
        .tag_cloud { padding: 3px; text-decoration: none; }
        .tag_cloud:link  { color: #81d601; }
        .tag_cloud:visited { color: #019c05; }
        .tag_cloud:hover { color: #ffffff; background: #69da03; }
        .tag_cloud:active { color: #ffffff; background: #ACFC65; }
    </style>
</head>
 
<body>
<fieldset style="background:#FF6600; padding:5px; border:#FF6000 5px dashed; width:480px;">
<legend style="font-size:25px; color:#333333; border:#FF6000 3px solid; background:#FF6600; padding:5px;">Etiket Bulutu</legend>
    <div style="width:500px;">
        <?php echo bulutla( $etiketArray );  ?>
    </div>
    </fieldset>
</body>
</html>