We are very pleased to announce the release of Yii Framework version 2.0.45.
Please refer to the instructions at https://www.yiiframework.com/download/
to install or upgrade to this version.
This release fixes more PHP 8.1 compatibility issues, fixes significant number of bugs and adds some enhancements.
Additionally, there are updates in the application templates:

• Templates are now tested on PHP 8.1, minimum required version is raised to 7.4.
• Updated to Bootstrap5.
• Swiftmailer replaced with Symfonymailer.
• Updated to Codeception 5.
• ::class is used now instead of strings.

Special thanks to virtual-designer, longthanhtran, WinterSilence, Arkeins, githubjeka, bizley, wa1kb0y, EtienneBruines for contributing compatibility fixes.
Thanks to all Yii community members who contribute to the framework,
translators who keep documentation translations up to date and community members who answer questions at forums.
There are many active Yii communities so if you need help or want
to share your experience, feel free to join them.
A complete list of changes can be found in the CHANGELOG.