PHP salt and hash SHA256 for login password

I've made encrypting of the password in my register script and they are stored in the database, and I have to use them to login, so I would want to use the unencrypted ones to login. I've read some of the threads in here but nothing is helping me. How can I add it in my login.php? The salt is also stored in the database.

This is my register.php script for encrypting

$hash = hash('sha256', $password1);

function createSalt()
{
    $text = md5(uniqid(rand(), TRUE));
    return substr($text, 0, 3);
}

$salt = createSalt();
$password = hash('sha256', $salt . $hash);

and this is my login.php with season

//Create query
$qry="SELECT * FROM member WHERE username='$username' AND password='$password'";
$result=mysql_query($qry);

//Check whether the query was successful or not
if($result) {
    if(mysql_num_rows($result) > 0) {
        //Login Successful
        session_regenerate_id();
        $member = mysql_fetch_assoc($result);
        $_SESSION['SESS_MEMBER_ID'] = $member['id'];
        $_SESSION['SESS_FIRST_NAME'] = $member['username'];
        $_SESSION['SESS_LAST_NAME'] = $member['password'];
        session_write_close();
        header("location: profile.php");
        exit();
    }
    else {
        //Login failed
        //error message 
    }
else {
    die("Query failed");
}