<?
class Clouds {
/**
* constructor
*/
function Clouds($filename = 'clouds.dat')
{
if(!file_exists($filename))
{
$f = fopen($filename,"w");
fwrite($f,serialize(array()));
fclose($f);
}
}
/**
* prepare words
*/
function prepareWord($entry)
{
$entry = preg_replace("/\d+/","",$entry);
$entry = preg_replace("/\W+/","-",$entry);
$entry = preg_replace("/(^\W)|(\W$)/","",$entry);
$entry = preg_replace("/[\-]+/","-",$entry);
return ($entry);
}
/**
* write
*/
function write($clouds,$filename = 'clouds.dat')
{
$f = fopen($filename,"w");
fwrite($f,serialize($clouds));
fclose($f);
}
/**
* read
*/
function read($filename = 'clouds.dat')
{
if(!file_exists($filename))
$clouds = new Clouds;
$file = file($filename);
$clouds = unserialize($file[0]);
return $clouds;
}
/**
* update
*/
function update($word)
{
$clouds = Clouds::read();
$word = Clouds::prepareWord($word);
if(array_key_exists($word,$clouds))
$clouds[$word]++;
else
$clouds[$word] = 1;
Clouds::write($clouds);
}
/**
* render clouds
*/
function render($format,$min = 9,$max = 28)
{
$clouds = Clouds::read();
if(sizeOf($clouds) == 0)
{
$result = 'No Data';
$clouds = new Clouds;
} else {
$minimum_count = min(array_values($clouds));
$maximum_count = max(array_values($clouds));
$spread = $maximum_count - $minimum_count;
$result = '';
foreach($clouds AS $cloud=>$cnt)
{
$size = $min + ($cnt - $minimum_count) * ($max - $min) / $spread;
$tag = @str_replace('###WORD###', $cloud, $format);
$tag = @str_replace('###SIZE###', floor($size), $tag);
$result .= $tag;
}
}
return $result;
}
}
// usage of class
// 1. add words. Clouds::update("php");
// 2. show tag cloud
//echo Clouds::render('<a href="?###WORD###" style="font-size:###SIZE###px">###WORD###</a> ');
?>
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