<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport"
	      content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title>Zadanie 1</title>
	<!-- Latest compiled and minified CSS -->
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
</head>
<body>
<div class="container">
	<div class="row">
		<div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" style="margin-top:20px;">
			<a href="index.php">Link do strony głównej</a><br>
			<a href="index.php?page=page1">Link do strony 1</a><br>
			<a href="index.php?page=page2">Link do strony 2</a><br>
			<a href="index.php?page=page3">Link do strony 3</a><br>
		</div>
		<div class="col-xs-12 col-sm-12 col-md-12 col-lg-12" style="margin-top:20px;">
            <?php

            if ($_SERVER['REQUEST_METHOD'] === 'GET') {
                if (isset($_GET['page'])) {

                    $path = 'pages/' . $_GET['page'] . '.php';//pages/page3.php

                    include_once($path); //pages/page3.php
                } else {
                    include('pages/main.php');
                }
            }

            ?>
		</div>
	</div>
</div>
</body>
</html>