Membuat form login php mysql

Membuat halaman form login dengan PHP dan HTML, di tutorial ini menggunakan XAMPP dan build function mysqli di PHP sehingga nantinya PHP terhubung dengan MySql atau MariaDB dan HTTP server menggunakan Apache bawaan dari XAMPP.

Pada tutorial ini studi case nya adalah :

  • membuat sebuah halam login
  • kemudian halaman registrasi
  • menampilkan informasi akun
  • menggunakan kode referal untuk melakukan registrasi, jadi jika tanpa kode referal maka tidak bisa melakukan registrasi.
  • dan selain itu di studi case form login php ini terdapat tombol logout.

Membuat file PHP form login

Oke langsung saja kita membuat beberapa file PHP kosong yang nantinya diisi pengkodean bahasa pemrograman php dengan beberapa nama file index.php, login.php, registration.php dan database.php kemudian disimpan dalam folder

INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
4.

selanjutnya, untuk nantinya bisa dijalankan di XAMPP maka folder

INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
4 ditaruh dalam folder program XAMPP di bagian
INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
6, contohnya saya menyimpan di drive C: maka alamatnya folder berada di
INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
7

Membuat Database dan tabel MySql menggunakan phpmyadmin

Setelah membuat beberapa file dan folder yang dibutuhkan untuk php form login selanjut membuat database MySql menggunakan phpmyadmin, nantinya database digunakan untuk menyimpan informasi akun sperti nama, email, password, kode kode referal.

  • Membuat tabel
    INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
    
    8 di database
    INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
    
    4 dengan persiapan jumlah kolom atau atribut 5.
    Membuat form login php mysql
  • memilih tipe data dan nama atribut seperti berikut yang menggunakan nama atribut atau kolom id, email, full_name, referal_code, dan password

CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) unsigned NOT NULL AUTO_INCREMENT,
  `email` varchar(50) DEFAULT NULL,
  `full_name` varchar(50) DEFAULT NULL,
  `referal_code` varchar(50) DEFAULT NULL,
  `password` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

Membuat form login php mysql

  • kamus data table

    INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
    
    8
    Membuat form login php mysql

  • memasukkan data ke tabel

    INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');
    
    8
    Membuat form login php mysql

  • menggunakan query untuk insert data

INSERT INTO `users` (`id`, `email`, `full_name`, `referal_code`, `password`) VALUES (NULL, '[email protected]', 'Aku Admin', '1234', '123321');

Memulai Pengkodean bagian PHP

  • database.php

<?php
function connect_database(){
  $DB_HOST = "localhost";
  $DB_USER = "root";
  $DB_PASSWORD = "";
  $DB_DATABASE = "simple_login_php";

  $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_DATABASE);
  if($mysqli->connect_error) die('Connect Error DB');
  return $mysqli;
}

function login($email, $password){
  $mysqli = connect_database();

  try {
    $stmt = $mysqli->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
    $stmt->bind_param("ss", $email, $password);
    $stmt->execute();
    $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
    $stmt->close();
  } catch (\Throwable $th) {
    throw $th;
  }

  return $result;
}

function registation($full_name, $email, $password, $referal_code){
  $mysqli = connect_database();

  if (referal_check($referal_code)) {
    $referal_code = substr(str_shuffle('0123456789'), 0, 5);

    $stmt = $mysqli->prepare("INSERT INTO users (full_name, email, password , referal_code) VALUES (?, ?, ?, ?)");
    $stmt->bind_param("sssi", $full_name, $email, $password, $referal_code);
    $stmt->execute();
    $user_id = $stmt->insert_id;
    $stmt->close();

    $stmt2 = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
    $stmt2->bind_param("i", $user_id);
    $stmt2->execute();
    $result = $stmt2->get_result()->fetch_all(MYSQLI_ASSOC);
    $stmt2->close();

    return $result;
  } else {
    return null;
  }
}

function referal_check($code){
  $mysqli = connect_database();

  $stmt = $mysqli->prepare("SELECT * FROM users WHERE referal_code = ? ");
  $stmt->bind_param("s", $code);
  $stmt->execute();
  $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
  $stmt->close();

  if (count($result) != 0) {
    return true;
  } else {
    return false;
  }

}

?>

  • login.php

<?php
session_start();
require('database.php');

$base_url = "http://localhost/simple_login_php";

if ($_SERVER["REQUEST_METHOD"] == "POST") {

  $email    = $_POST["email"];
  $password = $_POST["password"];

  $result_login = login($email, $password);

  if (count($result_login) > 0) {

    $_SESSION["data_login"] = $result_login;

    header("Location: /simple_login_php");
    die();
  } else {
    $message = "Email atau password salah <br>";
  }

}

?>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Login Form</title>
  <style>
    body {
      text-align: center;
    }
    form {
      display: inline-block;
    }
  </style>
</head>
<body>
<form action="" method="post">
  <?php !empty($message) ? print $message : ""?>

  <label><h1>Login ke Akun</h1></label>

  <label>Email :</label>
  <input type="email" name="email">
  <br><br>

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

  <button type="submit">Login</button>
  <br>
  <br>

  <label>
    <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
  </label>
</form>
</body>
</html>

  • index.php

<?php
session_start();
require('database.php');

$base_url = "http://localhost/simple_login_php";

if (empty($_SESSION["data_login"])) {
  header("Location: " . $base_url . "/login.php");
  die();
}

// logout action
if (count($_SESSION) != 0 && $_SERVER["REQUEST_METHOD"] == "POST" && $_POST['logout'] == 'true') {
  session_destroy();
  header("Location: " . $base_url . "/login.php");
  die();
}

?>

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>My Info</title>
  <style>
    body {
      text-align: center;
    }
  </style>
</head>
<body>
<center>
  <h1>Info Akun</h1>
  <table>
    <tr>
      <td>Email</td>
      <td>: <?= $_SESSION['data_login'][0]['email']?></td>
    </tr>
    <tr>
      <td>Nama Lengkap</td>
      <td>: <?= $_SESSION['data_login'][0]['full_name']?></td>
    </tr>
    <tr>
      <td>Kode Referal Kamu</td>
      <td>: <?= $_SESSION['data_login'][0]['referal_code']?></td>
    </tr>
  </table>
  <br>

  <form action="" method="post">
    <input type="hidden" name="logout" value="true">
    <button type="submit" value="true" >Logout</button>
  </form>
</center>
</body>
</html>

  • registration.php

<?php
require('database.php');
$base_url = "http://localhost/simple_login_php";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
  $result = registation($_POST["full_name"], $_POST["email"], $_POST["password"], $_POST["referal_code"]);
  if ($result) {
    session_start();
    $_SESSION["data_login"] = $result;
    header("Location: /simple_login_php");
    die();
  } else {
    $message = "tidak bisa mendaftar";
  }
}

?>
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Registration Form</title>
  <style>
    body {
      text-align: center;
    }
    form {
      display: inline-block;
    }
  </style>
</head>
<body>
<form action="" method="POST">
  <?php !empty($message) ? print $message : ""?>
  <label> <h1>Registrasi Akun</h1> </label>
  <label>Nama :</label>
  <input type="text" name="full_name">
  <br><br>

  <label>Email :</label>
  <input type="email" name="email">
  <br><br>

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

  <label>Kode referal :</label>
  <input type="text" name="referal_code">
  <br><br>
  <button type="submit">Daftar</button>
  <br><br>

  <label>
    <a href="<?= $base_url . '/login.php'?>">Login ke akun</a>
  </label>
</form>
</body>
</html>

Penjelasan :

  • <?php
    function connect_database(){
      $DB_HOST = "localhost";
      $DB_USER = "root";
      $DB_PASSWORD = "";
      $DB_DATABASE = "simple_login_php";
    
      $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_DATABASE);
      if($mysqli->connect_error) die('Connect Error DB');
      return $mysqli;
    }
    
    function login($email, $password){
      $mysqli = connect_database();
    
      try {
        $stmt = $mysqli->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
        $stmt->bind_param("ss", $email, $password);
        $stmt->execute();
        $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
      } catch (\Throwable $th) {
        throw $th;
      }
    
      return $result;
    }
    
    function registation($full_name, $email, $password, $referal_code){
      $mysqli = connect_database();
    
      if (referal_check($referal_code)) {
        $referal_code = substr(str_shuffle('0123456789'), 0, 5);
    
        $stmt = $mysqli->prepare("INSERT INTO users (full_name, email, password , referal_code) VALUES (?, ?, ?, ?)");
        $stmt->bind_param("sssi", $full_name, $email, $password, $referal_code);
        $stmt->execute();
        $user_id = $stmt->insert_id;
        $stmt->close();
    
        $stmt2 = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
        $stmt2->bind_param("i", $user_id);
        $stmt2->execute();
        $result = $stmt2->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt2->close();
    
        return $result;
      } else {
        return null;
      }
    }
    
    function referal_check($code){
      $mysqli = connect_database();
    
      $stmt = $mysqli->prepare("SELECT * FROM users WHERE referal_code = ? ");
      $stmt->bind_param("s", $code);
      $stmt->execute();
      $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
      $stmt->close();
    
      if (count($result) != 0) {
        return true;
      } else {
        return false;
      }
    
    }
    
    ?>
    
    6 : function bawaan di PHP untuk terhubung dengan MySql
  • <?php
    function connect_database(){
      $DB_HOST = "localhost";
      $DB_USER = "root";
      $DB_PASSWORD = "";
      $DB_DATABASE = "simple_login_php";
    
      $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_DATABASE);
      if($mysqli->connect_error) die('Connect Error DB');
      return $mysqli;
    }
    
    function login($email, $password){
      $mysqli = connect_database();
    
      try {
        $stmt = $mysqli->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
        $stmt->bind_param("ss", $email, $password);
        $stmt->execute();
        $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
      } catch (\Throwable $th) {
        throw $th;
      }
    
      return $result;
    }
    
    function registation($full_name, $email, $password, $referal_code){
      $mysqli = connect_database();
    
      if (referal_check($referal_code)) {
        $referal_code = substr(str_shuffle('0123456789'), 0, 5);
    
        $stmt = $mysqli->prepare("INSERT INTO users (full_name, email, password , referal_code) VALUES (?, ?, ?, ?)");
        $stmt->bind_param("sssi", $full_name, $email, $password, $referal_code);
        $stmt->execute();
        $user_id = $stmt->insert_id;
        $stmt->close();
    
        $stmt2 = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
        $stmt2->bind_param("i", $user_id);
        $stmt2->execute();
        $result = $stmt2->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt2->close();
    
        return $result;
      } else {
        return null;
      }
    }
    
    function referal_check($code){
      $mysqli = connect_database();
    
      $stmt = $mysqli->prepare("SELECT * FROM users WHERE referal_code = ? ");
      $stmt->bind_param("s", $code);
      $stmt->execute();
      $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
      $stmt->close();
    
      if (count($result) != 0) {
        return true;
      } else {
        return false;
      }
    
    }
    
    ?>
    
    7 : menyiapkan query yang akan dieksekusi
  • <?php
    function connect_database(){
      $DB_HOST = "localhost";
      $DB_USER = "root";
      $DB_PASSWORD = "";
      $DB_DATABASE = "simple_login_php";
    
      $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_DATABASE);
      if($mysqli->connect_error) die('Connect Error DB');
      return $mysqli;
    }
    
    function login($email, $password){
      $mysqli = connect_database();
    
      try {
        $stmt = $mysqli->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
        $stmt->bind_param("ss", $email, $password);
        $stmt->execute();
        $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
      } catch (\Throwable $th) {
        throw $th;
      }
    
      return $result;
    }
    
    function registation($full_name, $email, $password, $referal_code){
      $mysqli = connect_database();
    
      if (referal_check($referal_code)) {
        $referal_code = substr(str_shuffle('0123456789'), 0, 5);
    
        $stmt = $mysqli->prepare("INSERT INTO users (full_name, email, password , referal_code) VALUES (?, ?, ?, ?)");
        $stmt->bind_param("sssi", $full_name, $email, $password, $referal_code);
        $stmt->execute();
        $user_id = $stmt->insert_id;
        $stmt->close();
    
        $stmt2 = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
        $stmt2->bind_param("i", $user_id);
        $stmt2->execute();
        $result = $stmt2->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt2->close();
    
        return $result;
      } else {
        return null;
      }
    }
    
    function referal_check($code){
      $mysqli = connect_database();
    
      $stmt = $mysqli->prepare("SELECT * FROM users WHERE referal_code = ? ");
      $stmt->bind_param("s", $code);
      $stmt->execute();
      $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
      $stmt->close();
    
      if (count($result) != 0) {
        return true;
      } else {
        return false;
      }
    
    }
    
    ?>
    
    8 : biasa digunakan ketika mencoba eksekusi program akan tetapi ketika program gagal maka error akan ditangkap pada blok kode catch.
  • <?php
    function connect_database(){
      $DB_HOST = "localhost";
      $DB_USER = "root";
      $DB_PASSWORD = "";
      $DB_DATABASE = "simple_login_php";
    
      $mysqli = new mysqli($DB_HOST, $DB_USER, $DB_PASSWORD, $DB_DATABASE);
      if($mysqli->connect_error) die('Connect Error DB');
      return $mysqli;
    }
    
    function login($email, $password){
      $mysqli = connect_database();
    
      try {
        $stmt = $mysqli->prepare("SELECT * FROM users WHERE email = ? AND password = ?");
        $stmt->bind_param("ss", $email, $password);
        $stmt->execute();
        $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt->close();
      } catch (\Throwable $th) {
        throw $th;
      }
    
      return $result;
    }
    
    function registation($full_name, $email, $password, $referal_code){
      $mysqli = connect_database();
    
      if (referal_check($referal_code)) {
        $referal_code = substr(str_shuffle('0123456789'), 0, 5);
    
        $stmt = $mysqli->prepare("INSERT INTO users (full_name, email, password , referal_code) VALUES (?, ?, ?, ?)");
        $stmt->bind_param("sssi", $full_name, $email, $password, $referal_code);
        $stmt->execute();
        $user_id = $stmt->insert_id;
        $stmt->close();
    
        $stmt2 = $mysqli->prepare("SELECT * FROM users WHERE id = ?");
        $stmt2->bind_param("i", $user_id);
        $stmt2->execute();
        $result = $stmt2->get_result()->fetch_all(MYSQLI_ASSOC);
        $stmt2->close();
    
        return $result;
      } else {
        return null;
      }
    }
    
    function referal_check($code){
      $mysqli = connect_database();
    
      $stmt = $mysqli->prepare("SELECT * FROM users WHERE referal_code = ? ");
      $stmt->bind_param("s", $code);
      $stmt->execute();
      $result = $stmt->get_result()->fetch_all(MYSQLI_ASSOC);
      $stmt->close();
    
      if (count($result) != 0) {
        return true;
      } else {
        return false;
      }
    
    }
    
    ?>
    
    9 : melakukan import file PHP atau menggabungkan file PHP dengan yg lain.
  • <?php
    session_start();
    require('database.php');
    
    $base_url = "http://localhost/simple_login_php";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
      $email    = $_POST["email"];
      $password = $_POST["password"];
    
      $result_login = login($email, $password);
    
      if (count($result_login) > 0) {
    
        $_SESSION["data_login"] = $result_login;
    
        header("Location: /simple_login_php");
        die();
      } else {
        $message = "Email atau password salah <br>";
      }
    
    }
    
    ?>
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="UTF-8">
      <title>Login Form</title>
      <style>
        body {
          text-align: center;
        }
        form {
          display: inline-block;
        }
      </style>
    </head>
    <body>
    <form action="" method="post">
      <?php !empty($message) ? print $message : ""?>
    
      <label><h1>Login ke Akun</h1></label>
    
      <label>Email :</label>
      <input type="email" name="email">
      <br><br>
    
      <label>Password :</label>
      <input type="password" name="password">
      <br><br>
    
      <button type="submit">Login</button>
      <br>
      <br>
    
      <label>
        <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
      </label>
    </form>
    </body>
    </html>
    
    0 : memulai session dalam file PHP ketika dijalankan
  • <?php
    session_start();
    require('database.php');
    
    $base_url = "http://localhost/simple_login_php";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
      $email    = $_POST["email"];
      $password = $_POST["password"];
    
      $result_login = login($email, $password);
    
      if (count($result_login) > 0) {
    
        $_SESSION["data_login"] = $result_login;
    
        header("Location: /simple_login_php");
        die();
      } else {
        $message = "Email atau password salah <br>";
      }
    
    }
    
    ?>
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="UTF-8">
      <title>Login Form</title>
      <style>
        body {
          text-align: center;
        }
        form {
          display: inline-block;
        }
      </style>
    </head>
    <body>
    <form action="" method="post">
      <?php !empty($message) ? print $message : ""?>
    
      <label><h1>Login ke Akun</h1></label>
    
      <label>Email :</label>
      <input type="email" name="email">
      <br><br>
    
      <label>Password :</label>
      <input type="password" name="password">
      <br><br>
    
      <button type="submit">Login</button>
      <br>
      <br>
    
      <label>
        <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
      </label>
    </form>
    </body>
    </html>
    
    1 : memiliki nilai POST atau GET, pada umumnya jika di form mengirim data menggunakan POST maka bernilai POST.
  • <?php
    session_start();
    require('database.php');
    
    $base_url = "http://localhost/simple_login_php";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
      $email    = $_POST["email"];
      $password = $_POST["password"];
    
      $result_login = login($email, $password);
    
      if (count($result_login) > 0) {
    
        $_SESSION["data_login"] = $result_login;
    
        header("Location: /simple_login_php");
        die();
      } else {
        $message = "Email atau password salah <br>";
      }
    
    }
    
    ?>
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="UTF-8">
      <title>Login Form</title>
      <style>
        body {
          text-align: center;
        }
        form {
          display: inline-block;
        }
      </style>
    </head>
    <body>
    <form action="" method="post">
      <?php !empty($message) ? print $message : ""?>
    
      <label><h1>Login ke Akun</h1></label>
    
      <label>Email :</label>
      <input type="email" name="email">
      <br><br>
    
      <label>Password :</label>
      <input type="password" name="password">
      <br><br>
    
      <button type="submit">Login</button>
      <br>
      <br>
    
      <label>
        <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
      </label>
    </form>
    </body>
    </html>
    
    2 : mengarahkan akses yang biasanya disebut redirect, disini diarahkan ke file login.php jika kondisi session kosong.
  • <?php
    session_start();
    require('database.php');
    
    $base_url = "http://localhost/simple_login_php";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
      $email    = $_POST["email"];
      $password = $_POST["password"];
    
      $result_login = login($email, $password);
    
      if (count($result_login) > 0) {
    
        $_SESSION["data_login"] = $result_login;
    
        header("Location: /simple_login_php");
        die();
      } else {
        $message = "Email atau password salah <br>";
      }
    
    }
    
    ?>
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="UTF-8">
      <title>Login Form</title>
      <style>
        body {
          text-align: center;
        }
        form {
          display: inline-block;
        }
      </style>
    </head>
    <body>
    <form action="" method="post">
      <?php !empty($message) ? print $message : ""?>
    
      <label><h1>Login ke Akun</h1></label>
    
      <label>Email :</label>
      <input type="email" name="email">
      <br><br>
    
      <label>Password :</label>
      <input type="password" name="password">
      <br><br>
    
      <button type="submit">Login</button>
      <br>
      <br>
    
      <label>
        <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
      </label>
    </form>
    </body>
    </html>
    
    3 : memerintahkan PHP untuk tidak melakukan eksekusi pengkodean, atau memerintahkan berhenti.
  • <?php
    session_start();
    require('database.php');
    
    $base_url = "http://localhost/simple_login_php";
    
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    
      $email    = $_POST["email"];
      $password = $_POST["password"];
    
      $result_login = login($email, $password);
    
      if (count($result_login) > 0) {
    
        $_SESSION["data_login"] = $result_login;
    
        header("Location: /simple_login_php");
        die();
      } else {
        $message = "Email atau password salah <br>";
      }
    
    }
    
    ?>
    
    <!DOCTYPE html>
    <html lang="en">
    <head>
      <meta charset="UTF-8">
      <title>Login Form</title>
      <style>
        body {
          text-align: center;
        }
        form {
          display: inline-block;
        }
      </style>
    </head>
    <body>
    <form action="" method="post">
      <?php !empty($message) ? print $message : ""?>
    
      <label><h1>Login ke Akun</h1></label>
    
      <label>Email :</label>
      <input type="email" name="email">
      <br><br>
    
      <label>Password :</label>
      <input type="password" name="password">
      <br><br>
    
      <button type="submit">Login</button>
      <br>
      <br>
    
      <label>
        <a href="<?= $base_url . '/registration.php'?>">Daftar akun baru</a>
      </label>
    </form>
    </body>
    </html>
    
    4 : menunjukan bahwa nilai di session sudah terisi dan mengakses data memori beralamat ke 0 atau pertama.

source code ini bisa teman-teman lihat dan unduh atau clone di repository GitHub : https://github.com/SigitNurhanafi/simple_login_php