Adnan

<?interface IPerson{    public function sayHi($name);}class Person implements IPerson{	public function __construct()	{			}	public function sayHi($name)	{		echo "Hi $name how are you?\n";	}}class People implements IPerson{	public function __construct()	{	}	public function sayHi($name)	{		echo "Hi people how are you?\n";	}}function myfunc(IPerson $person){	echo $person->sayHi("Adnan");}$objPerson = new Person();$objPpl = new People();myfunc($objPerson);myfunc($objPpl);?>