public function getServerVersion() : string
    {
        return (is_array($this->apache_info) && array_key_exists('server-version', $this->apache_info))
                ? $this->apache_info['server-version']
                : 'Unknown'
        ;
    }
public function getServerVersion() : string
    {
        return (is_array($this->apache_info) && array_key_exists('server-version', $this->apache_info))
                ? $this->apache_info['server-version']
                : 'Unknown'
        ;
    }
public function getServerVersion ( ) : string { return ( is_array ( $ this -> apache_info ) && array_key_exists ( 'server-version' , $ this -> apache_info ) ) ? $ this -> apache_info [ 'server-version' ] : 'Unknown' ; }
Gets the Apache HTTP Server Version.
@return string Returns the version string or 'Unknown' if no version is available.
Gets the Apache HTTP Server Version .