How can I refactor complex PHP code to make it more modular and easier to debug?

Complex PHP code can be refactored to make it more modular and easier to debug by breaking it down into smaller, more manageable functions or classes. This allows for better organization and separation of concerns, making it easier to understand and maintain. Additionally, using proper naming conventions and comments can help clarify the purpose of each section of code.

// Original complex code
function complexFunction($param1, $param2) {
    // Complex logic here
}

// Refactored modular code
function simpleFunction1($param1) {
    // Simple logic here
}

function simpleFunction2($param2) {
    // Simple logic here
}

// Usage
$param1 = 'value1';
$param2 = 'value2';

simpleFunction1($param1);
simpleFunction2($param2);