cookie

<?php
//jalankan session
session_start();

require 'function.php';

if (isset($_COOKIE['id']) && isset($_COOKIE['key']) ) {
    # code...
    $id = $_COOKIE['id'];
    $key = $_COOKIE['key'];

    $result = mysqli_query($conn,"SELECT username FROM user WHERE id = $id");
    $row = mysqli_fetch_assoc($result);

    //cek cookie dan username
    if ($key === hash('ripemd160', $row['username'])) {
        # code...
        $_SESSION['login1'] = true;
    }

}

if (isset($_SESSION["login1"])) {
    # code...
    echo "
        <script>
            alert('Anda Telah Login!!');
            window.location='index.php';
        </script>
    ";
}


if (isset($_POST["login"])) {
    # code...
    //menangkap user dan passwordnya
    $username = $_POST["username"];
    $password = $_POST["password"];

    $result = mysqli_query($conn,"SELECT * FROM user WHERE username ='$username' ");

    if (mysqli_num_rows($result) === 1 ) {
        # code...
        //satu berarti ada, kalo ada cek password
        //cek password

        $row = mysqli_fetch_assoc($result);

        if (password_verify($password, $row["password"])) {
            # code...
            //set session
            $_SESSION["login1"] = true;

            //cek remember me
            if (isset ($_POST["remember"])) {
                # code...
                //buat cookie
                setcookie('id',$row["id"], time()+180);
                setcookie('key', hash('ripemd160',$row["username"], time()+180));
            }



            header("location: index.php");
            exit;
        }
    }
    $error = true;
}
?>