In what situations would it be necessary to differentiate between generated content and modules in a PHP script?

When working with a PHP script that includes both generated content and modules, it is important to differentiate between the two to ensure proper functionality and organization. Generated content is typically dynamic data that is outputted directly into the script, while modules are reusable blocks of code that perform specific functions. By clearly identifying and separating these two components, it becomes easier to maintain, update, and troubleshoot the script.

// Example of differentiating between generated content and modules in a PHP script

// Generated content
$userName = "John Doe";
echo "Welcome, $userName!";

// Module
function calculateSum($num1, $num2) {
  return $num1 + $num2;
}

// Using the module
$sum = calculateSum(5, 3);
echo "The sum is: $sum";