How can the code be optimized to reduce unnecessary comments and improve readability?

To optimize the code and reduce unnecessary comments, we can focus on writing clean and self-explanatory code. This includes using meaningful variable names, following coding best practices, and avoiding redundant comments that simply restate what the code is doing. By writing code that is easy to read and understand without excessive comments, we can improve readability and maintainability.

// Original code with unnecessary comments
// Calculate the sum of two numbers
function calculateSum($num1, $num2) {
    // Add the numbers together
    $sum = $num1 + $num2; // Calculate sum
    return $sum; // Return the sum
}

// Optimized code with improved readability
function calculateSum($num1, $num2) {
    $sum = $num1 + $num2;
    return $sum;
}