Command.class.php

  <?php 
  class Receiver
  {
      public function Action()
      {
          echo "Receiver->Action";
      }
  }

  abstract class Command{
      protected $receiver;
      function __construct(Receiver $receiver)
      {
          $this->receiver = $receiver;
      }
      abstract public function Execute();
  }

  class MyCommand extends Command
  {
      function __construct(Receiver $receiver)
      {
          parent::__construct($receiver);
      }

      public function Execute()
      {
          $this->receiver->Action();
      }
  }

  class Invoker
  {
      protected $command;
      function __construct(Command $command)
      {
          $this->command = $command;
      }

      public function Invoke()
      {
          $this->command->Execute();
      }
  }

  $receiver = new Receiver();
  $command = new MyCommand($receiver);
  $invoker = new Invoker($command);
  $invoker->Invoke();