function Request::getProtocolVersion

Returns the protocol version.

If the application is behind a proxy, the protocol version used in the requests between the client and the proxy and between the proxy and the server might be different. This returns the former (from the "Via" header) if the proxy is trusted (see "setTrustedProxies()"), otherwise it returns the latter (from the "SERVER_PROTOCOL" server parameter).

File

vendor/symfony/http-foundation/Request.php, line 1384

Class

Request

Request represents an HTTP request.

Namespace

Symfony\Component\HttpFoundation

Code

public function getProtocolVersion() : ?string {
    if ($this->isFromTrustedProxy()) {
        preg_match('~^(HTTP/)?([1-9]\\.[0-9]) ~', $this->headers
            ->get('Via') ?? '', $matches);
        if ($matches) {
            return 'HTTP/' . $matches[2];
        }
    }
    return $this->server
        ->get('SERVER_PROTOCOL');
}