db project by me for me

SQL Syntax:
CREATE TABLE IF NOT EXISTS `Members` (
  `Username` varchar(26) NOT NULL,
  `Password` varchar(255) NOT NULL,
  `loginStatus` int(1) NOT NULL,
  `Rank` int(3) NOT NULL
) DEFAULT CHARSET=utf8;
INSERT INTO `Members` VALUES
  ('', 'random_password', 0, 3),
  ('whoami@mailing.nl', 'rand_pass', 0, 1),
  ('skurt', 'mdrlol', 1, 1),
  ('useless', 'again_pass', 0, 1);

<?php
if(session_status()==1)
  session_start();
function getDB()
{
  return new PDO();
}

class User
{
  function isLogged()
  {
    return isset($_SESSION['LoginData']);
  }

  function isAdmin()
  {
    return isLogged()&&explode($_SESSION['LoginData'], '||')[1]=="3";
  }

  function logMe($user,$pass)
  {
    $usn = htmlspecialchars($user);
    $pwd = bcrypt(sha1("5TEAK1SG00DBUT54L715B3773R".$pass));
    $db = getDB();
    $sql = $db->prepare("SELECT Username,Password,loginStatus FROM Members WHERE Username = :usn, Password = :pwd, loginStatus != 1");
    $sql->execute(array(":usn" => $usn, ":pwd" => $pwd));
    if($sql->rowCount()==1)
    {
      $sql = $sql->fetchColumn(0);
      $_SESSION['LoginData'] = "$usn||".$sql['Rank']."||".date();
      return TRUE;
    }
  }

    function createMe($user,$pass)
    {
      $usn = htmlspecialchars($user);
      $pwd = bcrypt(sha1("5TEAK1SG00DBUT54L715B3773R".$pass));
      $db = getDB();
      $sql = $db->prepare("INSERT INTO Members VALUES (:usn, :pwd, 1, 0)");
      return $sql->execute(array(":usn" => $usn, ":pwd" => $pwd));
    }
  }
}