PHP program to demonstrate the example of a simple interface

<?php
//PHP program to demonstrate the example of 
//simple interface.
interface Inf
{
    public function fun1();
    public function fun2();
}

class Sample implements Inf
{
    public function fun1()
    {
        printf("fun1() called<br>");
    }
    public function fun2()
    {
        printf("fun2() called<br>");
    }
}

$obj = new Sample();

$obj->fun1();
$obj->fun2();
?>

Output
fun1() called
fun2() called