How can PHP developers optimize code readability and maintainability when dealing with multiple code blocks?

To optimize code readability and maintainability when dealing with multiple code blocks, PHP developers can utilize proper indentation, comments, and naming conventions. By organizing code into logical sections, using meaningful variable names, and adding comments to explain complex logic, developers can make the code easier to understand and maintain.

// Example of optimizing code readability and maintainability with comments and proper indentation

// Function to calculate the sum of two numbers
function calculateSum($num1, $num2) {
    // Add the two numbers together
    $sum = $num1 + $num2;
    
    // Return the sum
    return $sum;
}

// Example usage
$result = calculateSum(5, 10);
echo "The sum is: " . $result;