Php overloading

Question

?php
function add($a,$b)
{
$sum=$a+$b;
return $sum;
}
function add($a,$b,$c)
{
$sum=$a+$b+$c;
return $sum;
}
echo"sum of 2no".add(1020,20);
echo "sum of 3 no".add(10,20,30);

?>

Answer 1

First add < before ?php, in functions just write return $a + $b...(this is an advice) and you cannot have 2 same names of functions -> that's the actuall error

Answer 2

Overloading means same name