function Response::setLastModified

Sets the Last-Modified HTTP header with a DateTime instance.

Passing null as value will remove the header.

@final

Return value

$this

2 calls to Response::setLastModified()

BinaryFileResponse::setAutoLastModified in vendor/symfony/http-foundation/BinaryFileResponse.php: Automatically sets the Last-Modified header according the file modification date.
Response::setCache in vendor/symfony/http-foundation/Response.php: Sets the response's cache headers (validation and/or expiration).

File

vendor/symfony/http-foundation/Response.php, line 912

Class

Response: Response represents an HTTP response.

Namespace

Symfony\Component\HttpFoundation

Code

public function setLastModified(?\DateTimeInterface $date) : static {
    if (null === $date) {
        $this->headers
            ->remove('Last-Modified');
        return $this;
    }
    $date = \DateTimeImmutable::createFromInterface($date);
    $date = $date->setTimezone(new \DateTimeZone('UTC'));
    $this->headers
        ->set('Last-Modified', $date->format('D, d M Y H:i:s') . ' GMT');
    return $this;
}