public function __construct(array $config){
$this->_minVersion = (string)$config['minVersion'];
$this->_currentVersion = (string)phpversion();
$message = sprintf(
'%s %s %s %s %s (%s %s).',
$config['appName'],
(string)$config['appVersion'],
'requires PHP version',
$this->_minVersion,
'or above',
$this->_currentVersion,
'detected'
);
parent::__construct($message);
}