[SNIPPET] Tag cloud

<?php
/****************************************************
* Name: Tagcloud
* Version: 1.1.
* Desc: Displays the containing words of documents in a "tag cloud"
* created by Marc Hinse, [email protected], www.modxcms.de
* update: 25.04.06 - minor bugfix
*
* Usage: [[tagcloud?parent=`1,3,5,6,7,14`&min=`3`&landing=`12`
* Parameters:
* 	parent: comma separated list of the folders that conatin 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 donґt have one, create it like: [!FlexSearchForm?FSF_showResults=`1` &FSF_showForm=`0`!]
*   (this is required for linking the tags)
* ***************************************************/

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

$exclude = array('',' ','  ','   ','and','a','-','—','–','the','—','to','.',':',','); 	//exclude list
$zeichen = array(',','.',':');		//array of chars to be deleted
$parent= explode(',',$parent);

$content = "";
$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">';
$content=mb_strtolower(str_replace($zeichen,'',$modx->stripTags($content)),'UTF-8');	//all to lower and without HTML
$array_content=explode(' ',$content);	//split them in separate words
$anzahl=array_count_values($array_content);		//count the words
$words=array();
	foreach($anzahl as $key => $wert) {
		if($wert>$min && (!in_array($key,$exclude))) { 	//look if the word counts the required minimum and is not in the exclude list
			$words[$key] = $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;
?>