21段救命PHP代码(5)

6. PHP销毁目录
　　删除一个目录，包括它的内容。
        /*****
        *@dir - Directory to destroy
        *@virtual[optional]- whether a virtual directory
        */
        function destroyDir($dir, $virtual = false)
        {
                $ds = DIRECTORY_SEPARATOR;
                $dir = $virtual ? realpath($dir) : $dir;
                $dir = substr($dir, -1) == $ds ? substr($dir, 0, -1) : $dir;
                if (is_dir($dir) && $handle = opendir($dir))
                {
                        while ($file = readdir($handle))
                        {
                                if ($file == '.' || $file == '..')
                                {
                                        continue;
                                }