<?php
function add()
{
$params = func_get_args();
$sum = 0;
foreach($params as $param) {
$sum += $param;
}
return $sum;
}
echo 'sum 1: '.add(1, 2);
echo '<br>sum 2: '.add(6, 8, 30);
echo '<br>sum 3: '.add(14, 7, -3, 9, -20);
?>
Output
sum 1: 3
sum 2: 44
sum 3: 7