307'

<?php

​

class Stack

{

    const LIMIT = 100;

    private array $stack;

​

    public function __construct()

    {

        $this->stack = [];

    }

    public function addElem(int $elem): void

    {

        if (count($this->stack) < self::LIMIT)

        {

            array_unshift($this->stack, $elem);

        }

        else {

            throw new LogicException('Стек уже полон');

        }

    }

    public function printStack()

    {

        print_r($this->stack);

    }

}

​

$s = new Stack();

​

$s->addElem(1);

$s->addElem(5);

​

$s->printStack();