Top 16 Yii PHP Framework Interview Questions for 2020

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1) What is Yii Framework?

Yii is an open source, web application framework based on MVC. It is written in PHP and used to design PHP applications. This application was started on January and completed in December 2008.

2) Why does Yii Framework run so fast?

Yii Framework run so fast because it uses sluggish loading technique which does’t include class file until the class is initially used.

3) What are the features of Yii Framework?

There are various features of Yii Framework:

  • It uses MVC design pattern
  • Web Service available for Apps like android
  • Internationalization and localization translation for multilingual.
  • It provides Caching for speed up the application
  • It manages Error handling and logging for tracking
  • It provides cross-site scripting (XSS), cross-site request forgery (CSRF) protection
  • It provides PHP unit and Selenium for testing.
  • It provides automatic code generation that helps to fast development etc.

4) How can we define a form model?

We can define a form model in Yii1.1 by using following code:

5) What are the components available in Yii Framework?

There are following components available in Yii Framework:

  • db: It is used for database connection.
  • AssetManager: It manage the publishing of private assets files
  • authManager: It manages role-based access control
  • cache: It manages caching functionality
  • clientScript: It manages javascript and CSS
  • coreMessages: It provides translated core messages
  • errorHandler: It manages errors handling.
  • ThemeManager: It manages themes
  • urlManager: It provides URL parsing and creation functionality
  • statePersister: It provides mechanism for persisting global state
  • session: It manages session
  • securityManager: It manages Security

6) Which file loaded firstly while run a Yii application?

In Yii Framework, index.php file loaded first to display home page of the application.

7) How can we install or setup Yii Framework in our local system?

We can install or setup Yii Framework by using following given steps:

  • Download the Yii setup from its official website or github.
  • Extract the code into our server root directory.
  • Open command line terminal and type the following command.
  1. php path-to-yii-folder/framework/yiic webapp [webapp-name]
  • After execution of above command, it will ask for the confirmation of creating a new application, on selecting yes, it will create an application.

8) What is the Yii application life cycle?

Yii application life cycle includes the following steps:

  • Pre-initialize the application with Capplication::preinit()
  • Set up the class autoloader and error handling
  • Register core application components
  • Load application configuration
  • Initialize the application with Capplication::init()
  • Register application behaviors
  • Load static application components
  • Raise an onBeginRequest event
  • Process the user request
  • Collect information about the request
  • Create a controller
  • Run the controller
  • Raise an onEndRequest event

9) What are the database related functions in Yii?

In Yii, databse releted functions are:

  • Queryfind
  • findAll
  • findByPk
  • findBy

10) How can we connect to the database in Yii?

In Yii, we can connect database by using following code:

We can configure database related settings in the main.php file reside into the config folder.

11) What is a YiiBase in Yii Framework?

In Yii Framework, YiiBase is a helper class that provides functionalities of common framework. We should not use YiiBase directly, if we want to access helper class, we have to use its child class where we can customize the methods of YiiBase.

12) What is “gii” and how it works in Yii Framework?

In Yii Framework, gii is a module that provides Web-based code generation capabilities to the developer. We need to change the main configuration file of our application.

13) How can we access application components in Yii Project?

We can access an application component by using following code:

Where, ComponentID refers to the ID of the component.

14) How can we get current controller id in Yii ?

We can get current controller in Yii Framework by using given code:

15) How can we set default controller in our Yii Project ?

We can set default controller in our Yii Project by using given code:

16) What is the difference between “render” and “renderpartial” in Yii Framework?

In Yii Framework, render() is commonly used to render a view that corresponds to what a user sees as a “page” in your application.

renderPartial() is used to render a web page without layout.

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