code: public function move_uploaded_file($strSource, $strDestination)
  	{
  		$this->validate($strSource, $strDestination);
  
  		return move_uploaded_file($strSource, $this->strRootDir . '/' . $strDestination);
  	}
docs: Move an uploaded file to a folder
  
  @param string $strSource      The source file
  @param string $strDestination The new file path
  
  @return boolean True if the operation was successful