Cookies and variables - php

Question

I've created a login class for my web app and it does work, but now I've created that infamous "keep me logged in" - checkbox and don't get it to work. Here's my class for login:
<?php
error_reporting(E_ALL ^ E_NOTICE);
class Login {
private $error;
private $connect;
private $email;
private $password;
public $row;
public function __construct(PDO $connect) {
$this->connect = $connect;
$this->error = array();
$this->row = $row;
}
public function doLogin() {
$this->email = htmlspecialchars($_POST['email']);
$this->password = htmlspecialchars($_POST['password']);
$this->rememberme = $_POST['rememberme'];
if($this->validateData()) {
$this->fetchInfo();
}
return count($this->error) ? 0 : 1;
}
public function validateData() {
if(empty($this->email) || empty($this->password)) {
$this->error[] = "Täyttämättömiä kenttiä";
} else {
return count($this->error) ? 0 : 1;
}
}
public function fetchInfo() {
$query = "SELECT * FROM users WHERE email = :email AND activation_token IS NULL";
$stmt = $this->connect->prepare($query);
$stmt->execute(array(
':email' => $this->email,
));
if($stmt->rowCount() == 0) {
$this->error[] = "Väärä käyttäjätunnus tai salasana";
return 0;
} else {
$row = $stmt->fetch(PDO::FETCH_ASSOC);
$_SESSION['user_id'] = $row['user_id'];
$_SESSION['email'] = $row['email'];
$_SESSION['name'] = $row['name'];
$_SESSION['profilepic'] = $row['profilepic'];
if(isset($this->rememberme)) {
setcookie("loggedin", "yes", time() + 25200);
}
}
if (Register::cryptPass($this->password) != $row['password']) {
$this->error[] = "Virheelliset kirjautumistiedot";
} else {
return true;
}
return count($this->error) ? 0 : 1;
}
public function displayErrors() {
if(!count($this->error)) return;
echo "<div class='login_error'>";
foreach($this->error as $key=>$value) {
echo "<p>".$value."</p>";
}
echo "</div>";
}
public function doLogout() {
session_destroy();
}
}
?>
And here's a small part of my code from my another file where I'm checking if the session or cookie is set:
<?php
if (isset($_SESSION['email']) || isset($_COOKIE['loggedin'])) {
?>
<div id="header_container_isloggedin">
<div class="container_12">
<header id="header">
<div class="grid-12">
<ul id="menu">
<li class="profile-name">
<a href="profile.php?id=<?php echo $_SESSION['user_id']; ?>">
<span class="header_username">
<img src="images/thumbnails/<?php echo $_SESSION['profilepic']; ?>"
class="profile_evensmaller"/>
<span class="header_name"><?php echo $_SESSION['name']; ?></span></span></a>
</li>
</ul>
<?php } ?>
The problem is that everytime the cookie is set, it doesn't display my profile picture or name since they've saved inside of $_SESSION variable. So how should I approach this and get this to work. I know that right now it's not the safest method, since I'm not generating any hashes for that cookie, but right now the only thing I'm interested in, is to get this one to work.