class testParent
{
public function f1()
{
echo "poly" . "<br>";
}
public function f2()
{
echo "niru" . "<br>";
}
}
class testChild
{
public function f1($a)
{
echo "{$a}" . "<br>";
}
function f2($a)
{
echo "{$a}" . "<br>";
}
}
$a = new testChild();
$b = new testParent();
$b->f1();
$b->f2();
$a->f1("Polymorphism");
$a->f2("Inheritence");
?>
