PHP 创建标签云的简单实现方法

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代码如下:

 
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[] = '<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); 

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