Sometime we face a unique type of problem during development and we watch the code thoroughly but not find the error where we are getting. ‘Only variables should be passed by reference‘ in $file_extension = end(explode(‘.’, $file_name)) is the same type of problem which does not seem as error in our code and it happens in usual code.
Yii is a popular, powerful and highly extensible framework for faster application development. I found many newbies to struggling for successfully install, run and develop Yii application. Those who are learning it may find useful to install Yii 2.0 manually or without composer as demonstrated in this article.