[SNIPPET] Tag cloud

/****************************************************<?
* Name: TagCloudInc
* Version 1.1
* Desc: Displays how frequently the members of a wordlist appear in the site's content in a "tag cloud"
* created by Paul Paulousek [email protected]
* date July, 21. 2006
* based on tagcloud of Marc Hinse, [email protected], www.modxcms.de
* Version: 1.1.
*
* Usage: [[TagCloudInc?parent=`1,3,5,6,7,14`&min=`3`&landing=`12`]]
* Parameters: 
* 	parent: comma separated list of the folders that contain the documents which are to be counted
*	min: Minimum occurrences of a word to be displayed
*	landing: the id of your search result page. If you don¥t have one, create it like: [!FlexSearchForm?FSF_showResults=`1` &FSF_showForm=`0`!]
*   (this is required for linking the tags)
*       if a chunk named "cloudwords" exists, the snippet will take the content of it for building the cloud
*      the chunk must contain a comma-separated list of words.
* ***************************************************/

$parent = isset($parent)? $parent : "0"; 
$min = isset($min)? $min : "2";
$landing = isset($landing)? $landing : "[~[*id*]~]";

$include =  $modx->getChunk('cloudwords');
$include = explode(",",$include);
//try to get a Chunk for the include-words
if (sizeof($include)<2) {
$include = array('blog','method','edit','content','design','links','quickedit','MODx','customize'); 
//include list (sample, put in your words here)
}
//try to get a Chunk for the include-words
if (!isset($include)) {
$include = array('blog','method','edit','content','design','links','quickedit','MODx','customize'); 
}
//include list (sample, put in your words here)
$zeichen = array(',','.',':');		//array of chars to be deleted
if (strpos($parent,',')){
	$parent= explode(',',$parent);
}

$table = $modx->getFullTableName("site_content");
	foreach ($parent as $daddy){
		$select = $modx->db->select("pagetitle,content,introtext", $table, "parent = $daddy");	// record: title, content, introtext
		while ($contents = $modx->db->getRow($select)) {
			$content.=$contents['content'].' '.$contents['introtext'].' '.$contents['pagetitle']; 	//put them together
		}
	}

$output='<div class="tagcloud">';
$content=strtolower(str_replace($zeichen,'',$modx->stripTags($content)));	//all to lower and without HTML

$words=array();
	foreach($include as $incword) {
	$wert = substr_count($content,$incword);
		if($wert>$min) { 	//look if the word counts the required minimum and is in the include list 
			$words[$incword] = $wert;	//put them in a new array
		}
	} 

//unset($words['modx']);  //if you want to override the value of words (in this case 'modx'), uncomment it and put in your word
$max_size=max($words);	//word with most hits
//$words['modx']=8;     // put in again your deleted word and value from two lines above
ksort($words);	//sort them alphabetically (just comment that out, then they will be unsortet
$multiplier=300/$max_size;	//define the multiplier for the size (play with that to fit your site!)
$min_size=30;	//minimum size
	foreach($words as $key => $wert) {
		$font_size=$multiplier*$wert;
		//$countvalues='('.$wert.')';		//uncomment this for displaying the hits next to the links 
		$output.='<span><a style="font-size:'.max($font_size,$min_size).'%;" href="[~'.$landing.'~]&FSF_search='.$key.'">'.$key.'</a>'.$countvalues.'</span>  ';
		$output.="\r\n";
	}
$output.='</div>';
return $output;