PHP 创建标签云函数代码

　　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);