Finished the tutorial 'Saying Hello'

http://www.yiiframework.com/doc-2.0/guide-start-hello.html
Completed 'Working with Forms'

http://www.yiiframework.com/doc-2.0/guide-start-forms.html
Completed 'Working with Databases'

http://www.yiiframework.com/doc-2.0/guide-start-databases.html
Finished 'Generating Code with Gii'

http://www.yiiframework.com/doc-2.0/guide-start-gii.html
Added yii-check.php