In CodeIgniter, what configuration setting is crucial for controlling the types of files that can be uploaded?
- allowed_types
- file_restrictions
- file_validation
- upload_limits
In CodeIgniter, the crucial configuration setting for controlling the types of files that can be uploaded is allowed_types. This setting specifies the allowed file types for upload, helping to restrict uploads to only specified file formats and enhancing the security of the file upload functionality.
To output JSON formatted data, CodeIgniter's ________ method in the controller can be utilized.
- generate_json()
- load_json()
- output_json()
- render_json()
CodeIgniter provides the output_json() method in controllers to send JSON-formatted data as a response. This is useful when you want to return structured data for APIs or AJAX requests.
In complex systems, ________ tracking is a common method for tracing error origins across multiple systems or services.
- Debug
- Error
- Exception
- Log
In complex systems, log tracking is a common method for tracing error origins. Logs capture detailed information about events, making it easier to diagnose and fix issues across multiple services.
The tool in CodeIgniter that provides runtime statistics about the application is called the ________.
- Analyzer
- Debugger
- Inspector
- Profiler
CodeIgniter's Profiler tool provides runtime statistics about the application, aiding in performance analysis and optimization.
How does the Active Record Class in CodeIgniter handle complex join queries?
- Complex joins are not supported in CodeIgniter Active Record
- Performing joins with the execute_join() method
- Using the join() method
- Utilizing the merge_joins() function
CodeIgniter's Active Record Class provides the join() method for handling complex join queries. It allows you to specify the type of join and the conditions for joining tables, making it flexible for complex queries.
In CodeIgniter, how is the database cache functionality utilized to improve performance?
- Caching entire query result sets
- Caching individual query results
- Caching only metadata of query results
- Caching only query execution plans
CodeIgniter's database cache functionality can be utilized to improve performance by caching entire query result sets. This reduces the need to execute the same queries repeatedly, resulting in faster response times and reduced database load.
When debugging an issue where the data displayed in a view is outdated, the first thing to check in CodeIgniter is ________.
- Browser caching settings
- Controller logic
- Database connection
- View file caching
In CodeIgniter, views can be cached for performance improvement. If you encounter issues with outdated data in the view, the first thing to check is whether the view caching is enabled and if the cached view needs to be refreshed. This ensures that the latest data is displayed to the user.
Which function in CodeIgniter displays all PHP errors occurring in the script?
- display_errors()
- show_php_errors()
- log_php_errors()
- log_errors()
In CodeIgniter, the display_errors() function is used to display all PHP errors occurring in the script. This is often helpful during development to catch and address errors promptly. Enabling this option can be done in the configuration files of CodeIgniter. It's crucial to note that displaying errors in a production environment should be avoided for security reasons, and error logs should be used instead.
When limiting the number of results returned by a query in CodeIgniter, the ________ method is employed.
- fetch()
- get_limit()
- limit()
- restrict()
To limit the number of results returned by a query in CodeIgniter, the limit() method is used. It helps in specifying the number of records to be retrieved from the database result set.
What is the role of hooks in modifying the behavior of CodeIgniter controllers?
- Hooks allow you to tap into the core system and execute custom code at specific points
- Hooks are a way to create custom middleware for controllers
- Hooks are only applicable in models, not controllers
- Hooks are used to define URL patterns for routing
Hooks in CodeIgniter enable developers to modify the behavior of the core system at specific execution points. They provide a mechanism to extend or override the default functionality without directly modifying the core files.