php Flash tag cloud (flash tagcloud) implementation code

require("config.php");
require_once 'Tags.php';
$sql = "SELECT tags FROM demo"; //Here you can randomize or limit the taken out Number.
$rs = $db->query($sql);
while ($tags = $db->fetch_array($rs)) {
 $arr[] = split("|",iconv( "gb2312","utf-8",$tags['tags']));
}
$tags = new Tags($arr);
$tagsArr = $tags->getTags();
$tagsStr = '';
foreach ($tagsArr as $value){
 $tagsStr .= urlencode(''.$value.'');
}
$tagsStr .= '';
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js code part: