private function makeHeaderValue()
    {
        $pieces = ['max-age=' . $this->config['max-age']];

        if ($this->config['subdomains'])
        {
            $pieces[] = 'includeSubDomains';
        }

        if ($this->config['preload'])
        {
            $pieces[] = 'preload';
        }

        return implode('; ', $pieces);
    }
private function makeHeaderValue()
    {
        $pieces = ['max-age=' . $this->config['max-age']];

        if ($this->config['subdomains'])
        {
            $pieces[] = 'includeSubDomains';
        }

        if ($this->config['preload'])
        {
            $pieces[] = 'preload';
        }

        return implode('; ', $pieces);
    }
private function makeHeaderValue ( ) { $ pieces = [ 'max-age=' . $ this -> config [ 'max-age' ] ] ; if ( $ this -> config [ 'subdomains' ] ) { $ pieces [ ] = 'includeSubDomains' ; } if ( $ this -> config [ 'preload' ] ) { $ pieces [ ] = 'preload' ; } return implode ( '; ' , $ pieces ) ; }
Make the HSTS header value

@return string
Make the HSTS header value