How do you load a Helper in a CodeIgniter controller?
- $this->load->helper('helper_name');
- $this->helper->load('helper_name');
- include_helper('helper_name');
- require_once('helper_name');
In a CodeIgniter controller, you load a Helper using the syntax $this->load->helper('helper_name');. This makes the functions within the helper available for use in the controller. Incorrect options do not represent the correct way to load a Helper in CodeIgniter.
A developer wants to pass user profile data to a dashboard view in CodeIgniter. The most efficient approach is to use ________.
- $this->load->view('dashboard', $data);
- $this->load->view('dashboard', compact('data'));
- $this->load->view('dashboard', ['data' => $data]);
- $this->load->view('dashboard', array('data' => $data));
In CodeIgniter, the most efficient way to pass data to a view is by using an associative array. The option 3 demonstrates the correct syntax by passing the data directly within the load->view function. This approach keeps the code concise and readable.
The Active Record Class method ________ is used to delete records from the database.
- delete()
- destroy()
- erase()
- remove()
The correct method to delete records from the database using the Active Record Class in CodeIgniter is delete(). This method allows you to specify the table and the criteria for deletion.
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.
Ensuring that user inputs are __________ based on the expected data type is crucial in preventing SQL injection.
- Encrypted
- Sanitized
- Typed
- Validated
Ensuring that user inputs are typed, meaning they match the expected data type, is crucial in preventing SQL injection. This practice adds an additional layer of defense by ensuring that the input data is not only syntactically correct but also of the expected type.
When a CodeIgniter application's performance degrades, the primary debugging approach should focus on ______.
- Caching the entire application
- Identifying and optimizing queries
- Increasing server memory
- Upgrading CodeIgniter version
Performance degradation often relates to inefficient database queries. Identifying and optimizing these queries is a key step in improving the overall performance of a CodeIgniter application.
________ is a common protocol used alongside OAuth for secure authorization.
- HMAC (Hash-based Message Authentication Code)
- JWT (JSON Web Token)
- OpenID Connect
- SAML
OpenID Connect is a common protocol used alongside OAuth for secure authorization. It provides a way to verify the identity of the user and obtain additional user information during authentication.
For complex queries, Active Record Class allows method ________ to directly write parts of the SQL query.
- buildQuery()
- composeQuery()
- rawQuery()
- writeQuery()
The correct method for directly writing parts of the SQL query in Active Record Class is rawQuery(). This method is useful for handling complex queries where direct SQL is required.
How does CodeIgniter handle database versioning through migrations?
- A separate configuration file stores version numbers
- CodeIgniter doesn't support database versioning
- Each migration file includes a version number
- The database server manages versioning automatically
CodeIgniter handles database versioning through migrations by including a version number in each migration file. This version number helps CodeIgniter keep track of which migrations have been executed and ensures the database schema is up-to-date with the application's code.