Upgrading from Version 1.1

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Upgrading from Version 1.1

There are many differences between versions 1.1 and 2.0 of Yii as the framework was completely rewritten for 2.0. As a result, upgrading from version 1.1 is not as trivial as upgrading between minor versions. In this guide you'll find the major differences between the two versions.

If you have not used Yii 1.1 before, you can safely skip this section and turn directly to "Getting started".