How does using 'Query Binding' in CodeIgniter help in performance optimization?
- Enhances server security
- Improves code readability
- Increases database connectivity
- Reduces the risk of SQL injection
'Query Binding' in CodeIgniter helps in performance optimization by reducing the risk of SQL injection. It allows the framework to properly escape and sanitize input, preventing malicious SQL injection attacks. This not only improves security but also ensures the integrity of the database interactions.
To ensure backward compatibility in a CodeIgniter application update, unit testing should prioritize ________.
- CodeIgniter core functionalities
- Handling deprecated functions
- New features and enhancements
- User interface changes
To ensure backward compatibility, unit testing should prioritize handling deprecated functions. This ensures that the existing functionalities remain intact even with the updates.
What is the impact of using a whitelist approach for input validation in SQL injection defense?
- It allows only predefined, safe inputs
- It blocks all user inputs
- It encrypts the database
- It relies on blacklisting known dangerous inputs
Using a whitelist approach for input validation in SQL injection defense involves allowing only predefined, safe inputs to be accepted by the application. This approach helps prevent SQL injection by explicitly specifying the permissible inputs, thereby reducing the risk of unauthorized SQL commands being injected into the application.
Form validation that involves checking the data against a set of rules before it's processed is known as ________ validation.
- Dynamic
- Pre-submission
- Real-time
- Static
Pre-submission validation checks data against a set of rules before it's submitted, ensuring that only valid data is processed, enhancing the integrity of the submitted information.
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.
A developer finds that uploaded image files are being executed as scripts on the server. This indicates a failure in ________.
- Content-Type Headers
- File Permissions
- Input Validation
- Output Escaping
When image files are executed as scripts, it suggests a lack of proper input validation, allowing malicious content to be processed. Input validation ensures that the uploaded files are of the expected type and do not contain harmful code.
When encountering a 'database connection error' in a deployed CodeIgniter application, the immediate step is to check the ________ configuration.
- Caching Configuration
- Database Connection
- Error Logging
- Server Environment Configuration
In the case of a 'database connection error' in a deployed CodeIgniter application, the immediate step is to check the database connection configuration. This involves verifying the database hostname, username, password, and database name in the database.php configuration file to ensure they match the production environment.
In CodeIgniter, which library is commonly used for building RESTful APIs?
- Database_Library
- Form_Validation
- REST_Controller
- Session_Library
The REST_Controller library is commonly used in CodeIgniter for building RESTful APIs. It provides a set of convenient methods for handling RESTful requests and responses, making it easier to implement RESTful architecture in your CodeIgniter application.