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Response

Laminas\Http\Response is responsible for providing a fluent API that allows a developer to interact with all the various parts of an HTTP response.

A typical HTTP Response looks like this:

| VERSION | CODE | REASON |
|        HEADERS          |
|         BODY            |

The first line of the response consists of the HTTP version, status code, and the reason string for the provided status code; this is called the Response Line. Next is a set of zero or more headers. The remainder of the response is the response body, which is typically a string of HTML that will render on the client's browser, but which can also be a place for request/response payload data typical of an AJAX request. More information on the structure and specification of an HTTP response can be found in RFC-2616 on the W3.org site.

Quick Start

Response objects can either be created from the provided fromString() factory, or, if you wish to have a completely empty object to start with, by instantiating the Laminas\Http\Response class with no arguments.

use Laminas\Http\Response;
$response = Response::fromString(<<<EOS
HTTP/1.0 200 OK
HeaderField1: header-field-value
HeaderField2: header-field-value2

<html>
<body>
    Hello World
</body>
</html>
EOS);

// OR

$response = new Response();
$response->setStatusCode(Response::STATUS_CODE_200);
$response->getHeaders()->addHeaders([
    'HeaderField1' => 'header-field-value',
    'HeaderField2' => 'header-field-value2',
]);
$response->setContent(<<<EOS
<html>
<body>
    Hello World
</body>
</html>
EOS
);

Configuration Options

No configuration options are available.

Available Methods

The following table details available methods, their signatures, and a brief description. Note that the following references refer to the following fully qualified class names and/or namespaces:

  • Headers: Laminas\Http\Headers
  • Response: Laminas\Http\Response
Method signature Description
static fromString(string $string) : Response Populate object from string.
renderStatusLine() : string Render the status line header
setHeaders(Headers $headers) : self Provide an alternate Parameter Container implementation for headers in this object. (This is NOT the primary API for value setting; for that, see getHeaders().)
getHeaders() : Headers Return the container responsible for storing HTTP headers. This container exposes the primary API for manipulating headers set in the HTTP response. See the section on Headers for more information.
setVersion(string $version) : self Set the HTTP version for this object, one of 1.0, 1.1 or 2 (Response::VERSION_10, Response::VERSION_11, Response::VERSION_2). HTTP/2 support was added in laminas-http 2.10.0.
getVersion() : string Return the HTTP version for this response.
setStatusCode(int $code) : self Set HTTP status code.
getStatusCode() : int Retrieve HTTP status code.
setReasonPhrase(string $reasonPhrase) : self Set custom HTTP status message.
getReasonPhrase() : string Get HTTP status message.
isClientError() : bool Does the status code indicate a client error?
isForbidden() : bool Is the request forbidden due to ACLs?
isInformational() : bool Is the current status "informational"?
isNotFound() : bool Does the status code indicate the resource is not found?
isOk() : bool Do we have a normal, OK response?
isServerError() : bool Does the status code reflect a server error?
isRedirect() : bool Do we have a redirect?
isSuccess() : bool Was the response successful?
decodeChunkedBody(string $body) : string Decode a "chunked" transfer-encoded body and return the decoded text.
decodeGzip(string $body) : string Decode a gzip encoded message (when Content-Encoding indicates gzip). Currently requires PHP with zlib support.
decodeDeflate(string $body) : string Decode a zlib deflated message (when Content-Encoding indicates deflate). Currently requires PHP with zlib support.
setMetadata(string|int|array|Traversable $spec, mixed $value) : self Non-destructive setting of message metadata; always adds to the metadata, never overwrites the entire metadata container.
getMetadata(null|string|int $key, null|mixed $default) : mixed Retrieve all metadata or a single metadatum as specified by key.
setContent(mixed $value) : self Set message content.
getContent() : mixed Get raw message content.
getBody() : mixed Get decoded message content.
toString() : string Returns string representation of response.

Examples

Generating a Response object from a string

use Laminas\Http\Response;
$request = Response::fromString(<<<EOS
HTTP/1.0 200 OK
HeaderField1: header-field-value
HeaderField2: header-field-value2

<html>
<body>
    Hello World
</body>
</html>
EOS);

Generating a formatted HTTP Response from a Response object

use Laminas\Http\Response;
$response = new Response();
$response->setStatusCode(Response::STATUS_CODE_200);
$response->getHeaders()->addHeaders([
    'HeaderField1' => 'header-field-value',
    'HeaderField2' => 'header-field-value2',
]);
$response->setContent(<<<EOS
<html>
<body>
    Hello World
</body>
</html>
EOS);

Handle "Headers already sent" errors

Available since version 2.13.0

By default, laminas-http's Laminas\Http\PhpEnvironment\Response class, which is used in laminas-mvc applications, tests to see if PHP has already emitted HTTP headers and started emitting content before it attempts to send headers from the response object. If it has, it silently ignores this fact.

If you would like to capture that information (e.g., to log when it happens and which headers were not emitted, or to raise an exception), you can provide a callable to the Response::setHeadersSentHandler(), per the following example:

use Laminas\Http\PhpEnvironment\Response;

// On a new instance
$response = new Response();
$response->setHeadersSentHandler(function ($response): void {
    throw new RuntimeException('Cannot send headers, headers already sent');
});

If you are using laminas-mvc, we recommend creating a delegator factory for purposes of such injection. The delegator factory would look like this:

// in module/Application/src/InjectSendHeadersHandlerDelegator.php:

namespace Application;

use Interop\Container\ContainerInterface;
use Laminas\Http\PhpEnvironment\Response;
use Laminas\ServiceManager\Factory\DelegatorFactoryInterface;
use RuntimeException;

class InjectSendHeadersHandlerDelegator implements DelegatorFactoryInterface
{
    public function __invoke(
        ContainerInterface $container,
        string $serviceName,
        callable $factory
    ); Response {
        /** @var Response $response */
        $response = $factory();
        $response->setHeadersSentHandler(function (Response $response): void {
            throw new RuntimeException('Cannot send headers, headers already sent');
        });

        return $response;
    }
}

You would then configure your container to use this instance with the following configuration:

// in config/autoload/dependencies.global.php

use Application\InjectSendHeadersHandlerDelegator;
use Laminas\Http\PhpEnvironment\Response;

return [
    'service_manager' => [
        'delegators' => [
            Response::class => [
                InjectSendHeadersHandlerDelegator::class,
            ],
        ],
    ],
];