Creating a project structure

The following is the folder structure of our app:

• blog/: App root created earlier

• bin/: Specific command line tools of our blog app

• config/: Configuration files of our app

• data/: The SQLite database will be stored here

• src/: All PHP classes we write will be here

• vendor/: This is where Composer (see the following section) stores all downloaded dependencies including the source code of Doctrine

• bin/: This is a command-line tool provided by dependencies installed with Composer

• web/: This is the public directory that contains PHP pages and assets such as images, CSS, and JavaScript files

We must create all these directories except the vendor/ one that will be automatically generated later.