PHP OldLocalFile::userCan示例

 /**
  * Wrap and format the file's comment block, if the current
  * user is allowed to view it.
  *
  * @return string HTML
  */
 protected function getComment()
 {
     if ($this->file->userCan(File::DELETED_COMMENT, $this->list->getUser())) {
         $block = Linker::commentBlock($this->file->getDescription());
     } else {
         $block = ' ' . $this->list->msg('rev-deleted-comment')->escaped();
     }
     if ($this->file->isDeleted(File::DELETED_COMMENT)) {
         return "<span class=\"history-deleted\">{$block}</span>";
     }
     return $block;
 }