Semantic Coherence: Symfony – Signal Evidence & AI Readability

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Build with confidence at any scale

From passionate individuals to leading tech teams, Symfony fits all.

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What you can do with Symfony

Symfony is a powerful PHP framework that empowers developers to build scalable, high-performance web applications with reusable components, comprehensive documentation, and a strong community.

Web development
As a full-stack framework, Symfony offers everything you need: security, routing, templates, ORM, validation, emails, testing, and more — ready out of the box.
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CLI
Symfony Console powers Command-Line Interface apps and the Symfony developer experience — from code generation to deployment.
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Using Components
Symfony Components are the building blocks of modern PHP — modular, tested, and trusted by projects like Drupal, Laravel, API Platform, and Composer.
Learn more

APIs and Symfony UX
Build powerful APIs with Symfony and API Platform, and create seamless interfaces using Symfony UX, Turbo, and Stimulus — all with minimal boilerplate.
Learn more

Symfony packages are battle-tested and ready to solve all your needs

38 billion

downloads

+600k

Symfony developers

370

packages

350k

GitHub stars

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Get started with Symfony

Everything you need to get up to speed quickly!

Symfony Demo
Try Symfony and explore its universe — but beware, it's addictive!
Start demo

Read the docs
Unlock the full potential of Symfony — your journey starts with the docs!

Symfony: The Fast Track
The official Symfony book translated in many languages.

Watch SymfonyCasts
The Best PHP & Symfony video-tutorials.

Symfony Training
Boost your team's skills with expert-led from fundamentals to advanced techniques.

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A strategic choice for long-term success

Predictable, secure, and built to last — Symfony meets the demands of all companies.

Long-term support

LTS versions receive extended maintenance for years — ideal for enterprise lifecycles and stability.
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Security policy

Symfony follows a transparent security process — with monitored CVEs, audit, and long-term security fixes.
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Predictable releases

Symfony follows a strict release schedule, so you can plan, upgrade, and build with confidence.
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Open Source

Distributed under the MIT license and backed by a global community.
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Empower your projects with Symfony solutions

Supporting your Symfony projects from first line of code to successful delivery.

Symfony Upgrade
Ready to upgrade your applications to more recent versions of Symfony?
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SymfonyCloud
The best way to host your Symfony projects — powered by Upsun
Bootstrap your project in minutes
Synchronize your Git workflow and infrastructure
Continuous delivery straight from your terminal
Learn more

SymfonyInsight
Stay safe from critical risks to your projects and business — get the insights you need, when you need them
Detect vulnerabilities, prevent GDPR issues, and avoid lawsuits
Protect data integrity, avoid leaks, downtimes, and bugs
Enhance productivity and safeguard your brand’s reputation
Learn more

Symfony Services
From the very start of your development project to the run phase, including the design and build steps, SensioLabs unlocks smart ways to make your Symfony project a success.
Learn more

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Join the community

Take part of a passionate group of over 600,000 developers from more than 120 countries, all committed to helping PHP surpass the impossible.

Become a Symfony contributor
Whatever your skills or level, you can contribute to Symfony in lots of different ways!
Learn how to contribute

Get recognized as a Certified Symfony expert
Demonstrate your expertise with official Symfony, Twig, and Sylius certifications
Read more

Meet the community during conferences

Jun 4, 2026
SymfonyDay Montreal 2026
In English

Jun 11–12, 2026
SymfonyOnline June 2026
In English

Nov 26–27, 2026
SymfonyCon Warsaw 2026
In English

Mar 25–26, 2027
SymfonyLive Paris 2027
In English

View more events and meetups

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Describe your infrastructure
Deploy continuously
Synchronize your app data and services

Fully managed stack
CLI first
Continuous delivery
DevOps-less
Designed for Symfony developers
Performance and productivity oriented
Complete replica of your prod data in dev
See all features
Free trial
We cover it all, from PHP to database, search, security and performance.
Our Git backend and filesystem make it possible to go from dev to staging and production and back, in a matter of minutes.
All from the comfort of your console.

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Symfony Blog

All about Symfony releases, new Symfony features, and other important announcements

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May 18–24, 2026 A Week of Symfony #1012

This week, Symfony released 36 security advisories and published security releases 5.4.52, 6.4.40, 7.4.12, 8.0.12, 8.1.0 BETA3 and Twig 3.26.0. We also published an article about how we used Claude Mythos to analyze the Symfony and Twig codebases and uncover many of these security issues. Lastly, we announced that the Symfony UX 2.x branch is now in security-fixes-only maintenance mode and shared more details about the SymfonyOnline June 2026 conference.

May 24, 2026

#A week of symfony

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SymfonyDay Montreal 2026 The Hidden Cost of return new Response()

Mathias Arlaud will take a deep dive into the internals of Symfony's HTTP layer to explain the performance implications of how we handle responses and how to optimize your controllers for maximum efficiency

May 22, 2026

#Conferences

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Symfony UX 2.x Security Maintenance Update

Symfony UX 2.x is now in security-only maintenance mode. Going forward, all new features and bug fixes will target Symfony UX 3.x, while security updates for 2.x will continue until January 1, 2027. Learn what this means for existing projects and why now is the right time to plan your upgrade to Symfony UX 3.x.

May 22, 2026

#Other

❤️ 2

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New in Symfony 8.1 Messenger Improvements

Symfony 8.1 improves Messenger with batch fetching, AMQP priorities, smarter retries, and configurable resets.

May 22, 2026

#Living on the edge

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Claude Mythos Audited Symfony and Found 19 Vulnerabilities

Claude Mythos Preview, Anthropic's unreleased model, audited Symfony and Twig code and reported 19 vulnerabilities. All of them turned out to be real.

May 21, 2026

#Symfony

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❤️ 27

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CVE-2026-45070 Email Header Injection via Non-Token Characters in Mime Parameter Names

Email Header Injection via Non-Token Characters in Mime Parameter Names

May 20, 2026

#Security Advisories
#Symfony

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SymfonyOnline June 2026 Symfony Mate: Real Runtime Context for AI Coding Assistants

Johannes introduces Symfony Mate, an MCP server that exposes a curated, deterministic view of your running Symfony application (container, services, profiler, logs) to any MCP-aware client

May 20, 2026

#Conferences

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CVE-2026-46626 SymfonyRuntime CVE-2024-50340 Patch Bypass via parse_str/SAPI Argv Mismatch

SymfonyRuntime CVE-2024-50340 Patch Bypass: Web Requests Can Still Set APP_ENV/APP_DEBUG via parse_str/SAPI Argv Mismatch

May 20, 2026

#Security Advisories
#Symfony

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CVE-2026-45756 JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits: ReDoS

JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits: ReDoS

May 20, 2026

#Security Advisories
#Symfony

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CVE-2026-47212 Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauthenticated Webhook Event Injection

Twilio Notifier Webhook Parser Never Verifies the X-Twilio-Signature HMAC: Unauthenticated Webhook Event Injection

May 20, 2026

#Security Advisories
#Symfony

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Symfony Community

Symfony is committed to foster an open and welcoming environment for everyone

Symfony Community is a passionate group of over 600,000 developers
from more than 120 countries, all committed to helping PHP surpass the impossible.

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Join the Community

SymfonyConnect is the professional network for Symfony developers.
Create your profile
and start collecting badges now!

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Community Support

GitHub
ask Symfony questions

Slack chat
get real-time support

Professional Symfony support by SensioLabs, to get better results, faster.

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Interact

mastodon.social/
@symfony

twitter.com/
symfony

linkedin.com/company/
symfony-sas

facebook.com/
SymfonyFramework

bsky.app/profile/
symfony.com

threads.net/
@symfony

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Meet the Community

Upcoming events organized by the Symfony Community.

Symfony/PHP Meetup Barcelona by SensioLabs
Barcelona, Spain
Thursday, June 25, 2026, 18:00

Web Summer Camp 2026
Opatija, Croatia
Thursday, July 2, 2026, 18:30

View all upcoming events

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Diversity And Inclusion

Symfony is committed to foster an open and welcoming environment for everyone.
Read the Symfony Code of Conduct which governs all the official Symfony code repositories, activities and events.
Meet the diverse team in charge of enforcing the Code of Conduct and review the reporting guidelines to notify us about Code of Conduct violations.
Take part in the Symfony Diversity Initiative, a repository of ideas to improve diversity.
Follow the diversity news and updates from the official Symfony blog.

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Contribute to the Community

Thousands of volunteers contribute back to Symfony. Here are some of them picked randomly:

[IMG: Avatar of Sebastian Zoglowek, a Symfony contributor]

Sebastian Zoglowek

3 commits
·
10 lines

[IMG: Avatar of tabbi89, a Symfony contributor]

tabbi89

8 commits
·
39 lines

[IMG: Avatar of AntoJ, a Symfony contributor]

AntoJ

1 commits
·
2 lines

View all Symfony contributors

Whatever your skills or level, you can contribute to Symfony in lots of different ways!

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Developers

Submit patches

Report bugs

Report security issues

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Docs & Support

Contribute docs

Provide support

Hang on the Slack chat

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Promotion

Organize an event

Spread the word

Join a User Group