Answer: Answer: CodeIgniter is an open-source PHP framework used to develop web applications rapidly. It follows the Model-View-Controller (MVC) architectural pattern, which separates the application logic, user interface, and data.
Results for 56 CodeIgniter Interview Questions and Answers 2024
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Answer: Answer: Key features of CodeIgniter include:
- Lightweight framework.
- Follows the MVC pattern.
- Built-in security features.
- Extensible.
- No need for a template engine.
- Easy to learn and use.
- Excellent performance.
Answer: Answer: CodeIgniter 3.x supports PHP 5.6 or newer. CodeIgniter 4.x requires PHP 7.2 or newer.
Answer: Answer: MVC (Model-View-Controller) is a design pattern used in CodeIgniter:
- Model: Represents the data layer and business logic.
- View: Represents the presentation layer, i.e., the user interface.
- Controller: Acts as an intermediary between Model and View, handling user input and updating the model and view accordingly.
Answer: Answer: CodeIgniter can be installed by:
- Downloading the CodeIgniter package from the official website.
- Extracting the package and placing it in the web server’s root directory.
- Configuring the
base_url
inapplication/config/config.php
.
Answer: Answer: The typical directory structure of a CodeIgniter application includes:
- application/: Contains application code (controllers, models, views, configuration files).
- system/: Contains the CodeIgniter core files.
- user_guide/: Documentation files.
- index.php: The front controller of the application.
Answer: Answer: The config.php
file is used to configure various settings in a CodeIgniter application, such as base URL, encryption key, session settings, and other application-wide settings.
Answer: Answer: A controller in CodeIgniter is a PHP class that handles HTTP requests. It interacts with models and views to process data and return the output to the user.
Answer: Answer: A model in CodeIgniter is a PHP class that handles data-related logic. It interacts with the database, retrieves data, and returns it to the controller.
Answer: Answer: A view in CodeIgniter is a PHP file responsible for displaying the output to the user. It is mainly used to render HTML content based on the data passed from the controller.