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+---
+notice: 'This file is imported and can be edited at https://github.com/amphp/http-server-session/blob/3.x/README.md'
+title: 'Session Handling for HTTP servers in PHP'
+description: 'Learn how to handle user sessions, securely managing data across requests.'
+image: undraw/undraw_logistics.svg
+permalink: /http-server-session
+source: 'https://github.com/amphp/http-server-session/blob/3.x/README.md'
+layout: docs
+---
+AMPHP is a collection of event-driven libraries for PHP designed with fibers and concurrency in mind. This package provides an [HTTP server](https://amphp.org/http-server) plugin that simplifies session management for your applications. Effortlessly handle user sessions, securely managing data across requests.
+
+## Installation
+
+This package can be installed as a [Composer](https://getcomposer.org/) dependency.
+
+```bash
+composer require amphp/http-server-session
+```
+
+## Usage
+
+#### Basic usage
+
+To read data from the session is straightforward:
+
+```php
+$session->get('key'); // will read data stored in key 'key'
+```
+
+Note that `get()` will return `null` if the data in `key` are not found.
+
+In order to write data, the session must be `lock()`ed first so that it cannot be written from anywhere else.
+
+```php
+$session->lock();
+$session->set('key', $data);
+$session->commit(); // commits & unlocks
+```
+
+Calling `commit()` will store the data in the session storage and unlock the session.
+
+Other important methods of the `Session` class are:
+
+```php
+// regenerate the client id
+$session->regenerate();
+
+// force read from storage
+$session->read();
+
+// rollback what is `set()` in the session but has not been commit()ed yet
+$session->rollback();
+
+// destroy the session
+$session->destroy();
+```
+
+
+#### Use the middleware to access Session in a RequestHandler
+
+As this package is a plugin for [`amphp/http-server`](https://github.com/amphp/http-server) there is a middleware
+implementation available that injects the `Session` instance into the attributes of the `Request`. When the middleware
+is used the session is accessible from the attributes:
+
+```php
+use Amp\Http\Server\Request;
+use Amp\Http\Server\RequestHandler;
+use Amp\Http\Server\Response;
+use Amp\Http\Server\Session\Session;
+
+class SomeRequestHandler implements RequestHandler
+{
+    public function handleRequest(Request $request): Response
+    {
+        /** @var Session $session */
+        $session = $request->getAttribute(Session::class);
+
+        // any operations on the session
+
+        // return the response
+    }
+}
+```
+
+Note that if the attribute `Session::class` is not registered then `getAttribute` will throw a `MissingAttributeError`.
+
+The middleware will handle setting and reading a session cookie in the request/response as well as releasing all locks
+on the session after the request has been processed.
+
+If you haven't used middleware in `amphp/http-server`, follow the [instructions on how to use middle ware with `amphp/http-server`](https://github.com/amphp/http-server#middleware).
+
+A simple example is provided here [`examples/simple.php`](https://github.com/amphp/http-server-session/blob/3.x/examples/simple.php).
+
+The `SessionMiddleware` can be further configured from the constructor regarding four different aspects:
+
+* `SessionFactory`
+* `CookieAttributes`
+* Cookie name (default: `'session'`)
+* Request attribute (default: `Session::class`)
+
+The `CookieAttributes` is used to configure different cookie properties such as the expiry or the domain:
+
+```php
+$cookieAttributes = CookieAttributes::default()
+    ->withDomain('amphp.org')
+    ->withExpiry(new \DateTime('+30 min'))
+    ->withSecure();
+```
+
+#### Using the factory to create an instance of Session
+
+Internally the session works with 3 dependencies:
+
+* [`KeyedMutex`](https://github.com/amphp/sync/blob/2.x/src/KeyedMutex.php) - A synchronisation primitive to be used across contexts
+* [`SessionStorage`](https://github.com/amphp/http-server-session/blob/3.x/src/SessionStorage.php) - Interface for reading and writing data.
+* [`SessionIdGenerator`](https://github.com/amphp/http-server-session/blob/3.x/src/SessionIdGenerator.php) - Interface for generating and validating
+  a session ID.
+
+An instance of the [`Session`](https://github.com/amphp/http-server-session/blob/3.x/src/Session.php#L28) can be constructed easily using
+the provided [`SessionFactory`](https://github.com/amphp/http-server-session/blob/3.x/src/SessionFactory.php)
+
+```php
+/** @var \Amp\Http\Server\Session\SessionFactory $factory */
+$session = $factory->create($clientId);
+```
+
+This library comes with two storage implementations
+
+* LocalSessionStorage - Default
+* RedisSessionStorage - Storage in Redis
+
+and one session ID generator
+
+* Base64UrlSessionIdGenerator
+
+The constructor of the `SessionFactory` allows to configure the factory with other implementations, so that subsequent
+calls to `create()` will use the new injected implementations. This can be beneficial in the certain scenarios, including
+testing.
+
+## Contributing
+
+Please read [our rules](https://amphp.org/contributing) for details on our code of conduct, and the process for submitting pull requests to us.
+
+## Security
+
+If you discover any security related issues, please use the private security issue reporter instead of using the public issue tracker.
+
+## License
+
+The MIT License (MIT). Please see [LICENSE](./LICENSE) for more information.