<?php

abstract class Employee
{	protected $rank;
	protected $rate;
	protected $profession;
	protected $isBoss;
	
	abstract function getSalary();
	//abstract function getDrunkCoffee
}

// Наследуем класс Аналитик
class Analyst extends Employee
{
	
	public function getSalary(){}
	
}

$analyst = new Analyst;
$analyst->rank = 2;

var_dump($analyst);

?>