(PECL haru >= 0.0.1)
HaruDoc::setInfoAttr — Set the info attribute of the document
$type
   , string $info
   )Defines an info attribute. Uses the current encoding of the document.
type
     The type of the attribute. Can be one of the following:
HaruDoc::INFO_AUTHOR 
        HaruDoc::INFO_CREATOR 
        HaruDoc::INFO_TITLE 
        HaruDoc::INFO_SUBJECT 
        HaruDoc::INFO_KEYWORDS 
        info
     The value of the attribute.
   Returns TRUE on success.
  
发生错误时抛出 HaruException 异常。