Symfony
sponsored by SensioLabs
Menu
  • About
  • Documentation
  • Screencasts
  • Cloud
  • Certification
  • Community
  • Businesses
  • News
  • Download
  1. Home
  2. Documentation
  3. Cookbook
  4. Session
  5. Session Proxy Examples
  • Documentation
  • Book
  • Reference
  • Bundles
  • Cloud
Search by Algolia

Table of Contents

  • Encryption of Session Data
  • Readonly Guest Sessions

Session Proxy Examples

Edit this page

Warning: You are browsing the documentation for Symfony 2.2, which is no longer maintained.

Read the updated version of this page for Symfony 6.2 (the current stable version).

Session Proxy Examples

The session proxy mechanism has a variety of uses and this example demonstrates two common uses. Rather than injecting the session handler as normal, a handler is injected into the proxy and registered with the session storage driver:

1
2
3
4
5
6
use Symfony\Component\HttpFoundation\Session\Session;
use Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage;
use Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionStorage;

$proxy = new YourProxy(new PdoSessionStorage());
$session = new Session(new NativeSessionStorage($proxy));

Below, you'll learn two real examples that can be used for YourProxy: encryption of session data and readonly guest session.

Encryption of Session Data

If you wanted to encrypt the session data, you could use the proxy to encrypt and decrypt the session as required:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
use Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy;

class EncryptedSessionProxy extends SessionHandlerProxy
{
    private $key;

    public function __construct(\SessionHandlerInterface $handler, $key)
    {
        $this->key = $key;

        parent::__construct($handler);
    }

    public function read($id)
    {
        $data = parent::read($id);

        return mcrypt_decrypt(\MCRYPT_3DES, $this->key, $data);
    }

    public function write($id, $data)
    {
        $data = mcrypt_encrypt(\MCRYPT_3DES, $this->key, $data);

        return parent::write($id, $data);
    }
}

Readonly Guest Sessions

There are some applications where a session is required for guest users, but there is no particular need to persist the session. In this case you can intercept the session before it writes:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
use Foo\User;
use Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy;

class ReadOnlyGuestSessionProxy extends SessionHandlerProxy
{
    private $user;

    public function __construct(\SessionHandlerInterface $handler, User $user)
    {
        $this->user = $user;

        parent::__construct($handler);
    }

    public function write($id, $data)
    {
        if ($this->user->isGuest()) {
            return;
        }

        return parent::write($id, $data);
    }
}
This work, including the code samples, is licensed under a Creative Commons BY-SA 3.0 license.
We stand with Ukraine.
Version:
Symfony Code Performance Profiling

Symfony Code Performance Profiling

Peruse our complete Symfony & PHP solutions catalog for your web development needs.

Peruse our complete Symfony & PHP solutions catalog for your web development needs.

↓ Our footer now uses the colors of the Ukrainian flag because Symfony stands with the people of Ukraine.

Avatar of Andrew Tch, a Symfony contributor

Thanks Andrew Tch for being a Symfony contributor

1 commit • 66 lines changed

View all contributors that help us make Symfony

Become a Symfony contributor

Be an active part of the community and contribute ideas, code and bug fixes. Both experts and newcomers are welcome.

Learn how to contribute

Symfony™ is a trademark of Symfony SAS. All rights reserved.

  • What is Symfony?
    • Symfony at a Glance
    • Symfony Components
    • Case Studies
    • Symfony Releases
    • Security Policy
    • Logo & Screenshots
    • Trademark & Licenses
    • symfony1 Legacy
  • Learn Symfony
    • Symfony Docs
    • Symfony Book
    • Reference
    • Bundles
    • Best Practices
    • Training
    • eLearning Platform
    • Certification
  • Screencasts
    • Learn Symfony
    • Learn PHP
    • Learn JavaScript
    • Learn Drupal
    • Learn RESTful APIs
  • Community
    • SymfonyConnect
    • Support
    • How to be Involved
    • Code of Conduct
    • Events & Meetups
    • Projects using Symfony
    • Downloads Stats
    • Contributors
    • Backers
  • Blog
    • Events & Meetups
    • A week of symfony
    • Case studies
    • Cloud
    • Community
    • Conferences
    • Diversity
    • Documentation
    • Living on the edge
    • Releases
    • Security Advisories
    • SymfonyInsight
    • Twig
    • SensioLabs
  • Services
    • SensioLabs services
    • Train developers
    • Manage your project quality
    • Improve your project performance
    • Host Symfony projects
    Deployed on
Follow Symfony
Search by Algolia