118f9bc738e28b5079cf04bc3c88b2754f8ae04c9f1e1127d020389c49

$hash = bin2hex(random_bytes(59/2));

##
## Get data from database using $_POST variable from <form>
##
if(!empty($_POST['stay_loggedIn'])){
  setcookie('stay_loggedIn', $fetch_data['hash'], strtotime('+14 days'), '/');
}

if(!empty($_COOKIE['stay_loggedIn']) && empty($_SESSION['logged_cookie'])){

    ## Set this session variable to run this code only one time
    $_SESSION['logged_cookie'] = 1;

    $hash = $_COOKIE['stay_loggedIn'];
    $logeIn = $conn->prepare("SELECT * FROM users WHERE `hash` = :hash");
    $logeIn->bindValue(':hash', $hash, PDO::PARAM_STR);
    $logeIn->execute();
    $user_data = $logeIn->fetch(PDO::FETCH_ASSOC);
    ##
    ## Set session variables
    ##
}

$params = session_get_cookie_params();
setcookie('stay_loggedIn', '', time() - 3600, $params['path'], $params['domain'], $params['secure'], isset($params['httponly']));