When integrating a payment gateway, what is the role of an API key?
- Authenticate the user
- Securely transmit payment data
- Validate credit card expiration
- Verify transaction status
In payment gateway integration, an API key is used to authenticate and authorize the user, ensuring secure communication between the application and the payment gateway. It serves as a unique identifier for the application and helps control access to the payment gateway API.
In what scenario would you use the Active Record Class's batch update feature?
- The batch update feature is not supported in CodeIgniter
- When updating a single record with multiple values
- When updating multiple records with the same data
- When updating records based on a condition
The batch update feature is useful when you need to update multiple records with the same data efficiently. It helps reduce the number of queries executed, improving performance in scenarios where bulk updates are required.
In CodeIgniter, how is a controller differentiated when handling AJAX requests as opposed to standard requests?
- AJAX requests must be routed to a different controller
- AJAX requests must have a specific parameter in the URL
- Controllers check the 'X-Requested-With' header for 'XMLHttpRequest'
- Controllers do not differentiate between AJAX and standard requests
In CodeIgniter, controllers can differentiate between AJAX and standard requests by checking the 'X-Requested-With' header. If the header is set to 'XMLHttpRequest,' it indicates an AJAX request. This allows controllers to customize their response based on the type of request being made.
Integrating third-party libraries often requires updating the __________ file to include necessary dependencies.
- autoload.php
- config.php
- database.php
- routes.php
The autoload.php file in CodeIgniter is responsible for loading classes and dependencies. When integrating third-party libraries, you often need to update the autoload.php file to include the necessary dependencies required by the libraries.
Which feature in CodeIgniter helps to identify the source and nature of an error?
- Error Pages
- Exception Handling
- Logging Library
- Profiler
The Logging Library in CodeIgniter helps identify the source and nature of errors by recording detailed information about events, making it easier to analyze and debug issues.
In secure form validation, ________ tokens are often used to verify the authenticity of the form submission.
- CSRF
- HMAC
- JWT
- MD5
Cross-Site Request Forgery (CSRF) tokens are used to prevent unauthorized form submissions by ensuring that the form is submitted from the legitimate source.
In CodeIgniter, where are log files typically stored by default?
- application/logs
- storage/logs
- system/logs
- var/logs
By default, CodeIgniter stores log files in the application/logs directory. These log files contain information about errors, warnings, and other important messages generated during the execution of the application. Developers can configure logging settings in the config.php file within the application/config directory. The logging system is an essential tool for debugging and monitoring the application's behavior in different environments.
What is the significance of 'HTTP Strict Transport Security' (HSTS) in CodeIgniter?
- Enforces the use of secure connections by instructing browsers to only connect over HTTPS
- Enhances session management for improved user experience
- Facilitates client-side validation for form inputs
- Improves database performance through optimized queries
'HTTP Strict Transport Security' (HSTS) in CodeIgniter enforces the use of secure connections by instructing browsers to only connect over HTTPS. This helps prevent man-in-the-middle attacks and enhances overall application security.
How does implementing a Content Security Policy (CSP) help in the context of file uploads?
- Enhances file compression, improves overall system performance
- Prevents cross-site scripting (XSS) attacks, restricts unauthorized file access
- Simplifies file validation, streamlines upload workflow
- Speeds up file upload process, reduces server load
Implementing a Content Security Policy (CSP) is crucial in preventing cross-site scripting (XSS) attacks and restricting unauthorized file access. It provides an additional layer of security by controlling which sources are allowed to load, mitigating the risk of malicious file uploads.
What is the difference between checked and unchecked exceptions?
- Checked exceptions are explicitly declared in the code, and the compiler enforces their handling.
- Checked exceptions are never thrown by CodeIgniter applications.
- Unchecked exceptions are always caught at compile time.
- Unchecked exceptions are those that must be caught at runtime.
Checked exceptions in CodeIgniter are explicitly declared in the code, and the compiler mandates their handling. On the other hand, unchecked exceptions don't require explicit handling and can be caught at runtime. Understanding this distinction is essential for robust error management in CodeIgniter.
For complex schema changes, ________ should be used to avoid data loss during migrations.
- $this->db->modify()
- $this->db->protect()
- $this->db->update()
- Database Seeder
In CodeIgniter, $this->db->protect() should be used for complex schema changes to avoid data loss during migrations by wrapping column and table names with backticks.
A CodeIgniter application experiences slow load times during peak hours. The first step in optimizing should be to analyze ________.
- Database Queries
- Front-end Code
- Network Latency
- Server Logs
In optimizing a CodeIgniter application, analyzing server logs is crucial. This helps identify performance bottlenecks, errors, and areas for improvement. By understanding server behavior during peak hours, developers can pinpoint issues affecting load times.