When a CodeIgniter application receives a JSON payload in a POST request, the first step in processing this data is to ________.
- Decode the JSON payload and retrieve data
- Extract data using $this->input->post()
- Use $this->input->json() to parse the payload
- Validate the JSON structure
In CodeIgniter, when dealing with JSON payloads in POST requests, the first step is decoding the payload. The correct method for this is $this->input->post(), which automatically decodes and retrieves the data from the JSON payload.
What is the primary purpose of creating custom libraries in CodeIgniter?
- To encapsulate and reuse specific functionality across the application
- To enhance database performance
- To improve routing mechanisms
- To store configuration settings
Custom libraries in CodeIgniter are created to encapsulate and reuse specific functionality across the application. This promotes code organization, maintainability, and reusability, contributing to a more efficient development process.
What is the primary advantage of using Active Record Class for database operations in CodeIgniter?
- Direct execution of raw SQL queries
- Enhanced security through automatic input validation and escaping
- Limited functionality compared to other database libraries
- Reduced abstraction, providing more control over database interactions
The primary advantage of using the Active Record Class in CodeIgniter is enhanced security. It automatically performs input validation and escaping, reducing the risk of SQL injection attacks. By using parameterized queries and proper escaping mechanisms, the Active Record Class helps maintain a higher level of security in database operations, making it a safer choice for interacting with databases in CodeIgniter applications.
Which HTML5 feature provides native form validation without additional scripting?
- Cascading Style Sheets (CSS) validation
- Constraint Validation API
- Document Object Model (DOM) Validation API
- Hypertext Transfer Protocol Secure (HTTPS) validation
The Constraint Validation API in HTML5 provides native form validation without requiring additional scripting. This API allows developers to specify constraints directly in the HTML markup, and the browser takes care of validation. It includes attributes like required, pattern, and others to define rules for input fields without the need for additional scripting.
Custom libraries in CodeIgniter can be distributed via ________, enabling easier sharing and updating among developers.
- CodeIgniter Package Manager
- Composer
- Git
- Packagist
Git is a popular version control system that facilitates the distribution of custom CodeIgniter libraries. By hosting libraries on Git repositories, developers can easily share, update, and collaborate on projects, enhancing the overall development process.
How does the 'Controller' in MVC architecture communicate with the 'Model'?
- Direct function calls
- Session variables
- Through events and listeners
- Using RESTful APIs
In CodeIgniter's MVC architecture, Controllers interact with Models through events and listeners. Events triggered in the Controller are listened to by the Model, allowing communication without direct coupling.
Which directory do you typically find Helpers stored in a standard CodeIgniter project?
- /application/helpers
- /application/libraries
- /system/helpers
- /system/libraries
CodeIgniter Helpers are typically stored in the /application/helpers directory. This separation allows for easy organization and customization of helpers for specific projects. They should not be placed in the system directory, which is reserved for core framework files.
For a multi-language application, a controller in CodeIgniter switches the language based on user preference using the ________ method.
- $this->config->set_item()
- $this->lang->line()
- $this->lang->load()
- $this->language->switch()
CodeIgniter provides the $this->lang->load() method to switch the language in a multi-language application. It loads language files based on the user's language preference, enabling the application to display content in the selected language.
Which CodeIgniter function is used to load a view file?
- $this->render()
- $this->view()
- $this->load->file()
- $this->load->view()
In CodeIgniter, the correct function to load a view file is $this->load->view(). This function takes the view filename as its parameter and is responsible for rendering the view to the browser. Avoid options like $this->render() or $this->view() as they are not standard CodeIgniter functions.
How does CodeIgniter handle database configuration for different environments (development, testing, production)?
- CodeIgniter does not support environment-specific database configurations
- Defining separate constants for each environment in the configuration file
- Using environment-specific configuration files
- Using the same configuration file with conditional statements
CodeIgniter allows managing database configurations for different environments through environment-specific configuration files.