Phalcon\Http\Client\Header::build PHP Method

    public function build($flags = 0)
    {
        $lines = [];
        if ($flags & self::BUILD_STATUS && StatusCode::message($this->statusCode)) {
            $lines[] = 'HTTP/' . $this->version . ' ' . $this->statusCode . ' ' . StatusCode::message($this->statusCode);
        }
        foreach ($this->fields as $field => $value) {
            $lines[] = $field . ': ' . $value;
        }
        if ($flags & self::BUILD_FIELDS) {
            return implode("\r\n", $lines);
        }
        return $lines;
    }