/**
 *
 +--------------------------------------------------------------------
 * Description 递归创建目录
 +--------------------------------------------------------------------
 * @param  string $dir 需要创新的目录
 +--------------------------------------------------------------------
 * @return 若目录存在,或创建成功则返回为TRUE
 +--------------------------------------------------------------------
 * @author gongwen
 +--------------------------------------------------------------------
 */
function mkdirs($dir, $mode = 0777){ 
	if (is_dir($dir) || mkdir($dir, $mode)) return TRUE; 
	if (!mkdirs(dirname($dir), $mode)) return FALSE; 
	return mkdir($dir, $mode); 
}