Kaharov Dima Div-Man

## singleton.php
<?php
class Mysingleton
{
	 private static $instance;
	 private function __construct()
	 {}

		public static function getInstance()
		{
			if ( self::$instance == NULL )

## polymorphism.php
<?php
	  /* simplest Polymorphism example in Php */
	 abstract class Animal
	 {
		 static function makeSound(Animal $animal)
		 {
			 return $animal->getsound();
		 }
	 }
	<?php
	class Mysingleton
	{
	private static $instance;
	private function __construct()
	{}

	public static function getInstance()
	{
	if ( self::$instance == NULL )
	<?php
	/* simplest Polymorphism example in Php */
	abstract class Animal
	{
	static function makeSound(Animal $animal)
	{
	return $animal->getsound();
	}
	}