Download Yii 1.1

Composer is the recommended way to install Yii. If it is not installed yet, follow the instructions on the Composer website.

Latest release: 1.1.32 · December 23, 2025

Yii 1.1 is currently in maintenance mode.

Support and bug fixes
Until December 31, 2016
Security fixes and PHP 7/8 compatibility
Until December 31, 2026

Install with Composer Recommended

Install Yii into the project vendor directory.

Yii 1.1 package

composer require yiisoft/yii:^1.1

See the package details on Packagist.

Other installation methods

Download the stable release or obtain the development source.

Git

git clone git@github.com:yiisoft/yii.git yii

SVN

svn checkout https://github.com/yiisoft/yii/trunk/ yii

Older releases

Yii 1.0 and other historical resources.

Browse the Yii museum.

Documentation

Read online or download for offline use.