How can PHP developers effectively structure their code to handle multiple calculations and output different results based on specific conditions?

PHP developers can effectively structure their code by using conditional statements such as if, else if, and else to handle multiple calculations and output different results based on specific conditions. By organizing the code in a logical manner and breaking it down into smaller, manageable chunks, developers can easily maintain and update their code in the future.

// Example code snippet to handle multiple calculations and output different results based on specific conditions

$number = 10;

if ($number > 0) {
    echo "Number is positive.";
} elseif ($number < 0) {
    echo "Number is negative.";
} else {
    echo "Number is zero.";
}