21段救命PHP代码(9)

        $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);
　13. PHP寻找两个字符串的相似性
PHP 提供了一个极少使用的 similar_text 函数，但此函数非常有用，用于比较两个字符串并返回相似程度的百分比。
        similar_text($string1, $string2, $percent);
        //$percent will have the percentage of similarity

14. PHP在应用程序中使用 Gravatar 通用头像