经测试代码如下：
/**
* 创建标签云
*
* @param
* @author 编程之家 jb51.cc jb51.cc
**/
function getCloud( $data = array(),$minFontSize = 12,$maxFontSize = 30 )//PHP创建标签云
{
$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[] = '<a style="font-size: ' . floor( $size ) . 'px'
. '" href="#" title="\'' . $tag .
'\' returned a count of ' . $count . '">'
. htmlspecialchars( stripslashes( $tag ) ) . '</a>';
}
return join( "\n",$cloudTags ) . "\n";
}
/**************************
**** Sample usage ***/
$arr = Array('Actionscript' => 35,'Adobe' => 22,'Array' => 44,'Background' => 43,'Blur' => 18,'Canvas' => 33,'Class' => 15,'Color Palette' => 11,'Crop' => 42,'Delimiter' => 13,'Depth' => 34,'Design' => 8,'Encode' => 12,'Encryption' => 30,'Extract' => 28,'Filters' => 42);
echo getCloud($arr,12,36);
/*** 代码来自编程之家 jb51.cc（jb51.cc） ***/