//zad3
<h2>JEŚLI CHCESZ DODAĆ KOLEJNY WPIS <br>
<a href="zad3_dodaj.php"> naciśnij tutaj </a>
</h2>

<?php
	echo '<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >';
	if ($_SERVER['REQUEST_METHOD'] == "POST") {
		$napis = $_POST['name']." | ".$_POST['email']." | ".$_POST['desc']."\n";
		$file = fopen("DANE.TXT", "a");
		fputs($file, $napis);
		fclose($file);
		echo " <TABLE border='10' bgcolor=yellow width=400 frame=border>
		<tr>
			<th> NAZWISKO I IMIE </th>
			<th> ADRES POCZTOWY </th>
			<th> OPIS </th>
		</tr>";
		$file = fopen("DANE.TXT", "r");
		$plik = file("DANE.TXT");
		for($x = 0; $x < count($plik); $x++) {
			$t1 = explode("|", $plik[$x]);
			echo "<tr>";
			for($y = 0; $y < count($t1); $y++) {
				echo "<th>".$t1[$y]."</th>";
			}
			echo "</tr>";
		}
		echo "</TABLE>";
	}
?>

//zad3_dodaj
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" >
<form action="zad3.php" method="POST">
	<table>
		<tr>
			<td>imie i nazwisko:</td>
			<td><input type="text" name="name"></td>
		</tr>
		<tr>
			<td>twój adres e-mail:</td>
			<td><input type="mail" name="email"></td>
		</tr>
		<tr>
			<td>treść listu:</td>
			<td><textarea name="desc"></textarea></td>
		</tr>
	</table>
	<input type="submit" value="wyślij dane">
	<input type="reset" value="wyczyść dane">
</form>
//zad3_login
<?php
	session_start();
	if (isset($_SESSION['login']) && isset($_SESSION['password'])) {
	$username = $_SESSION['login'];
	$password = $_SESSION['password'];
	}
	else {
		$username = NULL;
		$password = NULL;
	}
	if(empty($username) || empty($password)) {
?>
	<form action="?case=register" method="post">
	<table>
		<tr>
		<td><b>Rejestracja:</b></td>
		<tr>
		<td>Login:</td>
		<td><input type="text" name="username"></td>
		</tr>
		<tr>
		<td>Password:</td>
		<td><input type="password" name="password"></td>
		</tr>
		<tr>
		<td><input type="submit" value="Register"></td>
		</tr>
	</table>
	</form>
	<form action="?case=login" method="post">
	<table>
		<tr>
		<td><b>Logowanie:</b></td>
		<tr>
		<td>Login:</td>
		<td><input type="text" name="username"></td>
		</tr>
		<tr>
		<td>Password:</td>
		<td><input type="password" name="password"></td>
		</tr>
		<tr>
		<td><input type="submit" value="Login"></td>
		</tr>
	</table>
	</form>


<?php
	}
	else {
		echo "Zalogowano jako: <br>".$username;
		echo "<br><a href=?case=logout>Wyloguj</a>";
	}
	if (isset($_GET['case'])) {
		$case = $_GET['case'];
		switch($case) {
			case 'register':
				if(isset($_POST['username'], $_POST['password']) && !empty($_POST['username']) && !empty($_POST['password'])) {
					$login1 = htmlspecialchars(trim($_POST['username']));
					$password1 = htmlspecialchars(trim(md5($_POST['password'])));
					$user = fopen("uzytkownicy.txt", "a+");
					while($line = fgets($user)) {
						$user1 = explode("|", $line);
						if(trim($user1[0]) == $login1) {
							$exists = true;
							break;
						}
					$exists = false;
					}
					if($exists) {
						echo "<span style='color:red;'>Uzytkownik o podanej nazwie juz istnieje</span>";
					}
					else {
						fputs($user, $login1."|".$password1."\n");
					}
					fclose($user);
					break;
				}
				else {
					echo "<span style='color:blue;'>Wypelnij wszystkie pola!</span>";
				}
				header('Location zad1.php');
				break;

			case 'login':
				if(isset($_POST['username'], $_POST['password']) && !empty($_POST['username']) && !empty($_POST['password'])) {
					$login2 = htmlspecialchars(trim($_POST['username']));
					$password2 = htmlspecialchars(trim(md5($_POST['password'])));
					$user2 = fopen("uzytkownicy.txt", "a+");
					while($line1 = fgets($user2)) {
						$user3 = explode("|", $line1);
						if(trim($user3[0]) == $login2 && trim($user3[1]) == $password2) {
							$exists = true;
							break;
						}
					$exists = false;
					}
					if(!$exists) {
						echo "<span style='color:red;'>Podana nazwa uzytkownika lub haslo sa niepoprawne</span>";
						break;
					}
					else {
						$_SESSION['login'] = $login2;
						$_SESSION['password'] = $password2;
						header("Location: zad3_login.php");
						break;
					}
					fclose($user2);
				}
				else {
					echo "<span style='color:blue;'>Wypelnij wszystkie pola!</span>";
					break;
				}
			case 'logout':
				session_unset();
				session_destroy();
				header('Location: zad3_login.php');
				break;
		}
	}
?>
//zad3_upload
<form action="zad3_upload.php" method="post" enctype="multipart/form-data">
    Wybierz plik: <input type="file" name="file"><br>
    <input type="submit" value="Wgraj">
</form>

<?php
	function pre_r($array){
		echo '<pre>';
		print_r($array);
		echo '</pre>';
	}

	if(isset($_FILES['file'])) {
		pre_r($_FILES);
		$ext_error = false;
		$extensions = array('zip', 'rar');
		$file_ext = explode('.', $_FILES['file']['name']);
		$file_ext = end($file_ext);
		if(!in_array($file_ext, $extensions)) {
			$ext_error = true;
		}

		if($_FILES['file']['error']) {
			switch($_FILES['file']['error']) {
				case 1:
					echo '<p> The file is bigger than this PHP installation allows</p>';
					break;
				case 2:
				   echo '<p> The file is bigger than this form allows</p>';
				   break;
				case 3:
				   echo '<p> Only part of the file was uploaded</p>';
				   break;
				case 4:
				   echo '<p> No file was uploaded</p>';
				   break;
			}
		}
		elseif($ext_error) {
			echo "Invalid file extension!";
		}
		else {
			echo "Success! Image has been uploaded!";
			move_uploaded_file($_FILES['file']['tmp_name'], 'files/'.$_FILES['file']['name']);
		}
	}
?>
//zad4_lastseen
<?php
	if(isset($_COOKIE['test'])) {
		echo "Ostatni raz byles na tej stronie ".date('d.m.Y H:i:s', $_COOKIE['test']);
		setcookie('test', time());
	}
	else
	{
		setcookie('test', time(), time() + (60 * 60 * 24 * 365 * 5));
		header('Location: zad4_lastseen.php');
	}
?>
//zad4_lifetime
<?php
    if(isset($_COOKIE['test'])){
        echo "To ciasteczko zniknie o godzinie: ".date("H:i:s", $_COOKIE['test'])."<br>";
    } else {
        setcookie('test', time()+(60), time()+(60));
        echo "Stworzono nowe ciasteczko<br>";
    }
?>