code: protected function markModified()
  	{
  		// Return if marked as modified already
  		if ($this->blnIsModified === true)
  		{
  			return;
  		}
  
  		$this->blnIsModified = true;
  
  		// Reset the top and bottom content (see #344)
  		$this->strTop = '';
  		$this->strBottom = '';
  
  		// Import the Files object (required in the destructor)
  		$this->Files = Files::getInstance();
  
  		// Parse the local configuration file
  		if (static::$blnHasLcf)
  		{
  			$strMode = 'top';
  			$resFile = fopen($this->strRootDir . '/system/config/localconfig.php', 'rb');
  
  			while (!feof($resFile))
  			{
  				$strLine = fgets($resFile);
  				$strTrim = trim($strLine);
  
  				if ($strTrim == '?>')
  				{
  					continue;
  				}
  
  				if ($strTrim == '### INSTALL SCRIPT START ###')
  				{
  					$strMode = 'data';
  					continue;
  				}
  
  				if ($strTrim == '### INSTALL SCRIPT STOP ###')
  				{
  					$strMode = 'bottom';
  					continue;
  				}
  
  				if ($strMode == 'top')
  				{
  					$this->strTop .= $strLine;
  				}
  				elseif ($strMode == 'bottom')
  				{
  					$this->strBottom .= $strLine;
  				}
  				elseif ($strTrim != '')
  				{
  					$arrChunks = array_map('trim', explode('=', $strLine, 2));
  					$this->arrData[$arrChunks[0]] = $arrChunks[1];
  				}
  			}
  
  			fclose($resFile);
  		}
  	}
docs: Mark the object as modified