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yiisoft/yii2

Yii 2: The Fast, Secure and Professional PHP Framework

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README.md

Yii 2 is a modern framework designed to be a solid foundation for your PHP application.

It is fast, secure and efficient and works right out of the box pre-configured with reasonable defaults.
The framework is easy to adjust to meet your needs, because Yii has been designed to be flexible.

[![Latest Stable Version](https://img.shields.io/packagist/v/yiisoft/yii2.svg?logo=packagist&style=for-the-badge&label=Stable)](https://packagist.org/packages/yiisoft/yii2)
[![Total Downloads](https://img.shields.io/packagist/dt/yiisoft/yii2.svg?style=for-the-badge)](https://packagist.org/packages/yiisoft/yii2)
[![Build Status](https://img.shields.io/github/actions/workflow/status/yiisoft/yii2/build.yml?style=for-the-badge&logo=github&label=Build)](https://github.com/yiisoft/yii2/actions/workflows/build.yml)
[![Static Analysis](https://img.shields.io/github/actions/workflow/status/yiisoft/yii2/static.yml?style=for-the-badge&label=Static&logo=github)](https://github.com/yiisoft/yii2/actions/workflows/static.yml)
[![codecov](https://img.shields.io/codecov/c/github/yiisoft/yii2.svg?style=for-the-badge&logo=codecov&logoColor=white&label=Codecov)](https://codecov.io/gh/yiisoft/yii2)

Installation
------------

> [!IMPORTANT]
> - The minimum required [PHP](https://www.php.net/) version of Yii is PHP `7.4`.
> - It works best with PHP `8`.

- [Follow the Definitive Guide](https://www.yiiframework.com/doc-2.0/guide-start-installation.html)
in order to get step by step instructions.

Documentation
-------------

- A [Definitive Guide](https://www.yiiframework.com/doc/guide/2.0) and 
a [Class Reference](https://www.yiiframework.com/doc/api/2.0) cover every detail
of the framework.
- There is a [PDF version](https://www.yiiframework.com/doc/download/yii-guide-2.0-en.pdf) of the Definitive Guide
and a [Definitive Guide Mirror](http://stuff.cebe.cc/yii2docs/) which is updated every 15 minutes.
- For Yii 1.1 users, there is [Upgrading from Yii 1.1](https://www.yiiframework.com/doc/guide/2.0/en/intro-upgrade-from-v1)
to get an idea of what has changed in 2.0.

Versions & PHP compatibility
----------------------------

> [!NOTE]
> See ["Release Cycle" at the website](https://www.yiiframework.com/release-cycle) for detailed information about supported versions.

Community
---------

- Participate in [discussions at forums](https://www.yiiframework.com/forum/).
- [Community Slack](https://join.slack.com/t/yii/shared_invite/MjIxMjMxMTk5MTU1LTE1MDE3MDAwMzMtM2VkMTMyMjY1Ng) and [Chat in IRC](https://www.yiiframework.com/chat/).
- Follow us on [Facebook](https://www.facebook.com/groups/yiitalk/), [Twitter](https://twitter.com/yiiframework)
and [GitHub](https://github.com/yiisoft/yii2).
- Check [other communities](https://github.com/yiisoft/yii2/wiki/communities).

Contributing
------------

The framework is [Open Source](LICENSE.md) powered by [an excellent community](https://github.com/yiisoft/yii2/graphs/contributors).

You may join us and:

- [Report an issue](docs/internals/report-an-issue.md)
- [Translate documentation or messages](docs/internals/translation-workflow.md)
- [Give us feedback or start a design discussion](https://www.yiiframework.com/forum/index.php/forum/42-general-discussions-for-yii-20/)
- [Contribute to the core code or fix bugs](docs/internals/git-workflow.md)
- [Become a sponsor](#sponsoring)

### Reporting Security issues

> [!WARNING]
> Please do not report security vulnerabilities through public GitHub issues.

Please refer to a [special page at the website](https://www.yiiframework.com/security/)
describing proper workflow for security issue reports.

### Directory Structure

```
build/               internally used build tools
docs/                documentation
framework/           core framework code
tests/               tests of the core framework code
```

### Spreading the Word

Acknowledging or citing Yii 2 is as important as direct contributions.

**In presentations**

If you are giving a presentation or talk featuring work that makes use of Yii 2 and would like to acknowledge it,
we suggest using [our logo](https://www.yiiframework.com/logo/) on your title slide.

**In projects**

If you are using Yii 2 as part of an OpenSource project, a way to acknowledge it is to
[use a special badge](https://img.shields.io/badge/Powered_by-Yii_Framework-green.svg?style=for-the-badge&logo=yii) in your README:

[![Yii2](https://img.shields.io/badge/Powered_by-Yii_Framework-green.svg?style=for-the-badge&logo=yii)](https://www.yiiframework.com/)

If your code is hosted at GitHub, you can place the following in your README.md file to get the badge:

```
[![Yii2](https://img.shields.io/badge/Powered_by-Yii_Framework-green.svg?style=for-the-badge&logo=yii)](https://www.yiiframework.com/)
```

### Sponsoring

Support this project by becoming a sponsor or a backer.

[![Open Collective sponsors](https://img.shields.io/opencollective/sponsors/yiisoft?style=for-the-badge&logo=opencollective)](https://opencollective.com/yiisoft) 
[![Open Collective backers](https://img.shields.io/opencollective/backers/yiisoft?style=for-the-badge&logo=opencollective)](https://opencollective.com/yiisoft)

Repository info

Default branch: master
Latest version: 2.0.55
Created: 2012-02-13
Last activity: 2026-10-15
License: BSD-3-Clause
Open issues: 299
Watchers: 1k

Topics

framework hacktoberfest php php-framework yii yii2

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