md5 buat password tidak terbaca

Script verifikasi passwordnya mana gan?

<?php
require_once('core/init.php');
$error="";
if(isset($_SESSION['users'])){
  header('Location:index.php');
}else{

if(isset($_POST['save'])){
  $nama=$_POST['username'];
  $pass=$_POST['password'];
  if(!empty(trim($nama))&&!empty(trim($pass))){
    if(cekdata($nama,$pass)){
      $_SESSION['users']=$nama;
      header('Location:index.php');
    }else{
      $error="tidak di temukan";
    }
  }else{
    $error="wajib di isi";
  }
}

require_once('view/header.php');
?>
<div id="login">
<form method="post" action="">
  <label for="username">UserName</label><br>
<input type="text" name="username" value="" ><br><br>

<label for="password">Password</label><br>
<input type="password" name="password" value=""><br><br>

<div id="error"><?php print $error ?></div><br>

<input type="submit" name="save" value="Login"><br>
<a href="register.php">Dont have Account..?</a>
<a href="index.php">Home</a>
</form>
</div>
<?php }?>

function register($nama,$pass,$email){
$nama=escape($nama);
$pass=escape($pass);
$email=escape($email);

$pass=md5($pass);
$query = "INSERT INTO blog2 (username,password,email,status) VALUES ('$nama','$pass','$email',0) ";
return run($query);
}
?>

ini fungsi loginnya gan yg palin bawah

function cekdata($nama,$pass){
$nama=escape($nama);
$pass=escape($pass);
$query="SELECT*FROM blog2 WHERE username='$nama'AND password='$pass'";
global $link;
if($result=mysqli_query($link,$query)){
  if(mysqli_num_rows($result)!=0){
    return true;
  }else{
    return false;
  }
}
}

oh iya gan bener,trimakasih atas bantuan semuanya :D