PHP generates tag cloud based on word frequency

Given one piece of text, this code analyzes text's word frequency distribution, generation tag云

/**
 * Tag cloud demo based on word frequency
 * @author: unknown
 * @since: 2007-02-27
*/

// Store frequency of words in an array
$freqData = array();

// Random words
$lorem = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Donec et ipsum gravida






Sed nonummy. For no mass
molestie, but feugiat
Sed soft
pleasant, but no one in risus.
 players But what is the land of the land? Mauris no lorem. Aeneas was sad just at the bow. Check and check. For the members Mauritian sauce
diam For convenience. Together with their companions, the mountains will give birth to the feathered and great push, and a ridiculous mouse will be born. Tomorrow and laughter. Proin et dolor laoreet mi
gravida members. You have to drink, you have to put it, you have to put it, you have to run away from the lake, it's a tin can, it's important. Cras eu sem.
";

// Get individual words and build a frequency table
foreach( str_word_count( $lorem, 1 ) as $word )
{
 // For each word found in the frequency table, increment its value by one
 array_key_exists( $word, $freqData ) ? $freqData[ $word ]++ : $freqData[ $word ] = 0;
}
// ============= ================================================
/ / = Function to actually generate the cloud from provided data =
// =================================== ===========================
function getCloud( $data = array(), $minFontSize = 12, $maxFontSize = 30 )
{
 $minimumCount = min( array_values( $data ) );
 $maximumCount = max( array_values( $data ) );
 $spread = $maximumCount - $minimumCount;
 $cloudHTML = '';
 $cloudTags = array() ;

 $spread == 0 && $spread = 1;

 foreach( $data as $tag => $count )
 {
 $size = $minFontSize + ( $count - $minimumCount )
 * ( $maxFontSize - $minFontSize ) / $spread;
 $cloudTags[] = ''
 . htmlspecialchars( stripslashes( $tag ) ) . '
 }

 return join( "n", $cloudTags ) . "n";
}
?>
 li> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

< ;html xmlns="http://www.w3.org/1999/xhtml">

 Tag Cloud Demo




 Sample Tag Cloud