escriba un programa que sume dos numeros enteros

nction add($a, $b) {
  return $a + $b;
}

add(1, 2);

PHP
function add($a, $b) {
  return $a + $b;
}

$a = 1;
$b = 2;
add($a, $b);

A:

The difference is that in the first example, the function is called with the parameters,