private function readConfigFile(string $configFilename): array
  {
    $settings = parse_ini_file($configFilename, true);

    $this->constantsFilename = self::getSetting($settings, false, 'constants', 'columns');
    $this->className         = self::getSetting($settings, false, 'constants', 'class');

    return $settings;
  }
private function readConfigFile(string $configFilename): array
  {
    $settings = parse_ini_file($configFilename, true);

    $this->constantsFilename = self::getSetting($settings, false, 'constants', 'columns');
    $this->className         = self::getSetting($settings, false, 'constants', 'class');

    return $settings;
  }
private function readConfigFile ( string $ configFilename ) : array { $ settings = parse_ini_file ( $ configFilename , true ) ; $ this -> constantsFilename = self :: getSetting ( $ settings , false , 'constants' , 'columns' ) ; $ this -> className = self :: getSetting ( $ settings , false , 'constants' , 'class' ) ; return $ settings ; }
Reads configuration parameters from the configuration file.

@param string $configFilename

@return array
Reads configuration parameters from the configuration file .