Which database helper function in CodeIgniter is used for debugging by displaying the last query executed?
- debug_query()
- last_query()
- print_last_query()
- show_query()
The last_query() function in CodeIgniter's database helper is used for debugging by displaying the last executed database query. It helps developers inspect and troubleshoot database interactions during development.
Advanced CodeIgniter performance optimization often involves fine-tuning:
- Caching mechanisms
- Database queries
- Front-end code
- Server configuration
Fine-tuning caching mechanisms, such as optimizing query caching and view caching, is crucial for advanced CodeIgniter performance optimization. It helps reduce the load on the server and speeds up application response times.
In CodeIgniter, which global array is used to define database connection parameters?
- $config['database']
- $database_params
- $db_config
- $db_params
The correct global array to define database connection parameters in CodeIgniter is $config['database']. This array holds values such as 'hostname', 'username', 'password', 'database', etc.
To strengthen CSRF defenses, the technique of ________ is used to ensure the origin of the request.
- Cross-Origin Resource Sharing (CORS)
- Cross-Site Request Forgery (CSRF)
- Cross-Site Scripting (XSS)
- SameSite Cookies
SameSite Cookies is a technique used to strengthen CSRF defenses by controlling when cookies are sent with cross-site requests, ensuring the origin of the request.
What is a typical challenge when implementing complex database migrations?
- Code Refactoring
- Cross-Browser Compatibility
- Data Integrity
- Performance Optimization
Implementing complex database migrations often poses challenges to data integrity. Ensuring that data remains accurate and consistent throughout the migration process is a critical consideration.
What is the primary purpose of integrating social media into a web application?
- Enhancing user engagement
- Improving database performance
- Optimizing code readability
- Streamlining server operations
Social Media Integration
What is the recommended approach for handling exceptions in CodeIgniter models?
- Allow PHP to handle exceptions by default.
- Ignore exceptions and rely on error logging.
- Use the 'show_error()' function to display exceptions.
- Use try-catch blocks to catch exceptions and handle them.
The recommended approach for handling exceptions in CodeIgniter models is to use try-catch blocks. This allows for proper handling and logging of exceptions.
A developer needs to consistently format dates across the application. The best approach is to use the ________ Helper.
- date
- form
- format
- text
In CodeIgniter, the date Helper is used to format dates consistently across the application. It provides functions to format, manipulate, and work with dates in a standardized way.
In CodeIgniter, how can you roll back a transaction in case of an error?
- $this->db->commit();
- $this->db->rollback();
- $this->db->trans_commit();
- $this->db->trans_rollback();
In CodeIgniter, you can roll back a transaction in case of an error using the $this->db->trans_rollback(); method. This function will undo all queries run after the trans_start() method was called.
To override default controllers, models, or libraries, the developer should place these in the ________ directory.
- application/controllers
- application/custom
- application/extensions
- application/overrides
In CodeIgniter, to override default controllers, models, or libraries, the developer should place these customized versions in the 'application/overrides' directory.