What are the best practices for structuring PHP scripts to improve readability and maintainability, especially when dealing with complex data manipulation tasks?

When dealing with complex data manipulation tasks in PHP, it's important to follow best practices for structuring your scripts to improve readability and maintainability. One approach is to break down your code into smaller, reusable functions that each handle a specific task. This not only makes your code easier to understand but also allows for easier testing and debugging.

// Example of structuring PHP scripts for complex data manipulation tasks

// Define a function to handle data manipulation
function manipulateData($data) {
    // Perform complex data manipulation tasks here
    // This could include filtering, sorting, or transforming the data
    return $manipulatedData;
}

// Main script logic
$data = fetchDataFromSource();

$manipulatedData = manipulateData($data);

// Use the manipulated data for further processing
processData($manipulatedData);