How can breaking down PHP code into smaller, manageable functions help in troubleshooting and maintaining code quality?

Breaking down PHP code into smaller, manageable functions can help in troubleshooting and maintaining code quality by improving readability, reusability, and modularity. It allows for easier identification of errors, as each function is responsible for a specific task, making debugging more straightforward. Additionally, smaller functions are easier to test individually, leading to more robust and reliable code.

// Example of breaking down PHP code into smaller functions

function calculateSum($num1, $num2) {
    return $num1 + $num2;
}

function calculateProduct($num1, $num2) {
    return $num1 * $num2;
}

$number1 = 5;
$number2 = 3;

$sum = calculateSum($number1, $number2);
$product = calculateProduct($number1, $number2);

echo "Sum: " . $sum . "<br>";
echo "Product: " . $product;