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PSR bridge

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Transform your Yii2 applications into high-performance, PSR-compliant powerhouses

Supporting traditional SAPI, RoadRunner, FrankenPHP, and worker-based architectures

Run a Yii application with PSR-7 requests and responses, including long-running workers. The bridge provides a PSR-15 request handler, Yii request/response adapters, upload conversion, and a streaming SAPI emitter.

Available deployment options

Section titled “Available deployment options”

High-Performance Worker Mode

Section titled “High-Performance Worker Mode”

Long-running PHP workers for higher throughput and lower latency.

Features

Section titled “Features”

Feature Overview

Installation

Section titled “Installation”

Requires the filter and mbstring PHP extensions. Install a PSR-7/PSR-17 implementation alongside the bridge; the example uses HttpSoft:

Terminal window
composer require yii2-extensions/psr-bridge:^0.4 httpsoft/http-message

See installation.

Quick start

Section titled “Quick start”

In an existing Yii application, use this entry script in place of the usual Application::run(). The example assumes web/index.php, Composer dependencies, and the application’s config/web.php with its routes and secret request.cookieValidationKey already configured.

<?php


declare(strict_types=1);


use HttpSoft\Message\{ResponseFactory, ServerRequestFactory, StreamFactory, UploadedFileFactory};
use Psr\Http\Message\{ResponseFactoryInterface, StreamFactoryInterface};
use yii2\extensions\psrbridge\creator\ServerRequestCreator;
use yii2\extensions\psrbridge\emitter\SapiEmitter;
use yii2\extensions\psrbridge\http\Application;


ini_set('session.use_cookies', '0');


require dirname(__DIR__) . '/vendor/autoload.php';
require dirname(__DIR__) . '/vendor/yiisoft/yii2/Yii.php';


$config = require dirname(__DIR__) . '/config/web.php';


$config['container']['definitions'][ResponseFactoryInterface::class] = ResponseFactory::class;
$config['container']['definitions'][StreamFactoryInterface::class] = StreamFactory::class;


$app = new Application($config);
$creator = new ServerRequestCreator(new ServerRequestFactory(), new StreamFactory(), new UploadedFileFactory());


$request = $creator->createFromGlobals();
$response = $app->handle($request);


$emitted = false;


try {
    (new SapiEmitter())->emit($response, $request->getMethod() !== 'HEAD');
    $emitted = true;
} finally {
    $app->finalize($emitted);
}

Application supplies the bridge request, response, and error handler by default. For a worker, create the application once and repeat handle(), runtime emission, then finalize() for each request. Keep file streams open until emission completes. A PSR-15 host must arrange this extra finalization step.

Worker lifecycle defaults

Section titled “Worker lifecycle defaults”

useSession=false skips eager session opening around bootstrap; session IDs are still isolated on every request. Keep request-scoped components out of persistentComponents.

Smart Body Parsing

Section titled “Smart Body Parsing”

See the configuration guide before changing lifecycle settings or handling JSON bodies created from SAPI globals.

Documentation

Section titled “Documentation”

Practical guides and complete examples for PSR-7 integration and the worker lifecycle.

AI assistance

Section titled “AI assistance”

AI agents: use the repository guides and source for the installed revision. For a documentation deployment with llms.txt, read that index first. When Markdown export is enabled, append index.md to a page URL. For Yii conventions, use the yii2-framework skill from a local framework documentation checkout.

If the hosted sources are unavailable, use the repository guides and locally available skills.

Our social networks

Section titled “Our social networks”

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License

Section titled “License”

License

Package

Section titled “Package”