What are some best practices for managing complex functions in PHP to maintain readability?

When dealing with complex functions in PHP, it's essential to break down the functionality into smaller, more manageable parts to maintain readability. One way to achieve this is by using helper functions or breaking down the logic into separate functions with clear names and responsibilities. Additionally, documenting the code with comments and using meaningful variable names can greatly improve understanding for yourself and other developers.

// Complex function broken down into smaller, more readable parts
function complexFunction($input) {
    $processedData = processData($input);
    $formattedData = formatData($processedData);
    
    return $formattedData;
}

function processData($input) {
    // Process the input data here
    return $processedData;
}

function formatData($data) {
    // Format the processed data here
    return $formattedData;
}