What best practices should the user follow to avoid nested conditions causing issues in PHP scripts?

Nested conditions in PHP scripts can lead to readability issues, code complexity, and potential bugs. To avoid these problems, users should follow best practices such as using early returns, breaking down complex conditions into separate functions, and utilizing switch statements or polymorphism when appropriate.

// Example of refactoring nested conditions using early returns

function processOrder($order) {
    if (!isValidOrder($order)) {
        return false;
    }
    
    if (isOrderReady($order)) {
        return true;
    }
    
    return false;
}