FrankenPHP\Response

FrankenPHP\Response class — set status codes, headers, write body content, redirect, and send the HTTP response from an async worker.

FrankenPHP\Response ​

(True Async 0.6+)

The Response object is passed to your handler callback by HttpServer::onRequest(). It provides methods to set the status code, headers, body, and send the response to the client.

Important: always call end() to send the response, even when the body is empty. write() buffers data in the object; end() sends everything to the client. Omitting end() will hang the request.

Class Synopsis ​

php
namespace FrankenPHP;

class Response
{
    public function setStatus(int $code): void;
    public function getStatus(): int;
    public function setHeader(string $name, string $value): void;
    public function addHeader(string $name, string $value): void;
    public function removeHeader(string $name): void;
    public function getHeader(string $name): ?string;
    public function getHeaders(): array;
    public function isHeadersSent(): bool;
    public function redirect(string $url, int $code = 302): void;
    public function write(string $data): void;
    public function end(): void;
}

Methods ​

setStatus ​

php
public Response::setStatus(int $code): void

Set the HTTP status code. Default is 200.

getStatus ​

php
public Response::getStatus(): int

Returns the current status code.

setHeader ​

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public Response::setHeader(string $name, string $value): void

Set a header, replacing any existing values for that name.

addHeader ​

php
public Response::addHeader(string $name, string $value): void

Append a header value. Use this for headers that can have multiple values, such as Set-Cookie.

removeHeader ​

php
public Response::removeHeader(string $name): void

Remove a previously set header.

getHeader ​

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public Response::getHeader(string $name): ?string

Returns the first value of a header, or null if not set.

getHeaders ​

php
public Response::getHeaders(): array

Returns all headers as an associative array name => [values...].

isHeadersSent ​

php
public Response::isHeadersSent(): bool

Returns true if end() has already been called.

redirect ​

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public Response::redirect(string $url, int $code = 302): void

Sets the Location header and the status code. You still need to call end() after.

write ​

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public Response::write(string $data): void

Buffers response body data. Can be called multiple times — chunks are concatenated.

end ​

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public Response::end(): void

Sends the status code, headers, and buffered body to the client. Must be called to complete the response. After end(), further calls to write() or header methods have no effect.

Examples ​

Example #1 Basic text response ​

php
<?php

use FrankenPHP\HttpServer;
use FrankenPHP\Request;
use FrankenPHP\Response;

HttpServer::onRequest(function (Request $request, Response $response): void {
    $response->setStatus(200);
    $response->setHeader('Content-Type', 'text/plain');
    $response->write('Hello, World!');
    $response->end();
});

Example #2 JSON API response ​

php
<?php

use FrankenPHP\HttpServer;
use FrankenPHP\Request;
use FrankenPHP\Response;

HttpServer::onRequest(function (Request $request, Response $response): void {
    $data = ['status' => 'ok', 'time' => time()];

    $response->setStatus(200);
    $response->setHeader('Content-Type', 'application/json');
    $response->write(json_encode($data));
    $response->end();
});

Example #3 Setting cookies and redirecting ​

php
<?php

use FrankenPHP\HttpServer;
use FrankenPHP\Request;
use FrankenPHP\Response;

HttpServer::onRequest(function (Request $request, Response $response): void {
    $cookies = $request->getCookies();

    if (!isset($cookies['session'])) {
        $response->addHeader('Set-Cookie', 'session=abc123; Path=/; HttpOnly');
        $response->addHeader('Set-Cookie', 'theme=dark; Path=/');
        $response->redirect('/welcome');
        $response->end();
        return;
    }

    $response->setStatus(200);
    $response->setHeader('Content-Type', 'text/plain');
    $response->write('Welcome back!');
    $response->end();
});

Example #4 Streaming-style writes ​

php
<?php

use FrankenPHP\HttpServer;
use FrankenPHP\Request;
use FrankenPHP\Response;

HttpServer::onRequest(function (Request $request, Response $response): void {
    $response->setStatus(200);
    $response->setHeader('Content-Type', 'text/plain');

    // Multiple write() calls — all data is buffered and sent at end()
    $response->write("Line 1\n");
    $response->write("Line 2\n");
    $response->write("Line 3\n");

    $response->end();
});

See Also ​