How to use the round function in PHP to calculate a sum

In PHP, the round function can be used to round numbers. If you want to sum up multiple numbers, you can use a combination of arrays and loops.

Here is an example code:

$numbers = [1.23, 4.56, 7.89];

$sum = 0;
foreach ($numbers as $number) {
    $sum += round($number);
}

echo "Sum: " . $sum;

In the above code, an array $numbers containing multiple numbers is first defined. Then, a foreach loop is used to iterate through each number in the array, rounding each number using the round function and adding it to the $sum variable. Finally, the sum is outputted.

Please modify the values of the $numbers array and the output format according to actual needs.