How can linking classes and index files be done effectively in PHP templates?

When working with PHP templates, it is important to effectively link classes and index files to ensure proper organization and functionality. One way to do this is by using the require_once() function to include the necessary files within the template file. This allows you to access the classes and functions defined in those files without duplicating code or causing conflicts.

// In your template file (e.g., index.php)
require_once('path/to/your-class-file.php');
require_once('path/to/your-index-file.php');

// Now you can use the classes and functions defined in the included files
$instance = new YourClass();
$instance->yourMethod();