original_string: public function addLogFile($key, $logFileName)
      {
          $arrayKey=strtolower($key);
          return $this->_logFiles[$arrayKey] = $logFileName;
      }
code: public function addLogFile($key, $logFileName)
      {
          $arrayKey=strtolower($key);
          return $this->_logFiles[$arrayKey] = $logFileName;
      }
code_tokens: public function addLogFile ( $ key , $ logFileName ) { $ arrayKey = strtolower ( $ key ) ; return $ this -> _logFiles [ $ arrayKey ] = $ logFileName ; }
docstring: Add log file
  Valid if multiple log files exist
  
  @param mixed $key
  @param string $logFileName
  @return bool
docstring_tokens: Add log file Valid if multiple log files exist