☛ Variables: For declaring Variables, all letters are lowercase, and words are separated by underscores

☛ Class and Module: Modules and Classes uses MixedCase and have no underscore; each word starts with a uppercase letter

☛ Database Table: The database table name should have lowercase letters and underscore between words, and all table names should be in the plural form for example invoice_items

☛ Model: It is represented by unbroken MixedCase and always have singular with the table name

☛ Controller: Controller class names are represented in plural form, such that OrdersController would be the controller for the order table.