<?php
 session_start();
 // initializing variables

 $server = "localhost";
$user = "id7022262_base_yusran";
$password = "yusran8";
$nama_database = "id7022262_pendaftaran_siswa";
 $errors = array();
 // connect to the database
 $db = mysqli_connect($server, $user, $password, $nama_database);
 // REGISTER USER
 if (isset($_POST['reg_user'])) {
  // receive all input values from the form
 /* $username = mysqli_real_escape_string($db, $_POST['username']);
  $email = mysqli_real_escape_string($db, $_POST['email']);
  $password_1 = mysqli_real_escape_string($db, $_POST['password_1']);
  $password_2 = mysqli_real_escape_string($db, $_POST['password_2']);
*/
  $username = $_POST['username'];
  $email = $_POST['email'];
  $password_1 = $_POST['password_1'];
  $password_2 = $_POST['password_2'];
  // form validation: ensure that the form is correctly filled ...
  // by adding (array_push()) corresponding error unto $errors array
  if (empty($username)) { array_push($errors, "Username is required"); }
  if (empty($email)) { array_push($errors, "Email is required"); }
  if (empty($password_1)) { array_push($errors, "Password is required"); }
  if ($password_1 != $password_2) {
      array_push($errors, "The two passwords do not match");
  }
  // first check the database to make sure
  // a user does not already exist with the same username and/or email

  $user_check_query = "INSERT INTO login_siswa (username, email, password_1) VALUE ('$username', '$email', '$password_1')";//"SELECT * FROM users WHERE username='$username' OR email='$email' LIMIT 1";
  $result = mysqli_query($db, $user_check_query);
  $user = mysqli_fetch_assoc($result);
  if ($user) { // if user exists
   if ($user['username'] === $username) {
    array_push($errors, "Username already exists");
   }
   if ($user['email'] === $email) {
    array_push($errors, "email already exists");
   }
  }
  // Finally, register user if there are no errors in the form
  else if (count($errors) == 0) {
       $password = md5($password_1);//encrypt the password before saving in the database
       $query = "INSERT INTO login_siswa (username, email, password_1)
                  VALUES('$username', '$email', '$password_1')";
       mysqli_query($db, $query);
       $_SESSION['username'] = $username;
       $_SESSION['success'] = "You are now logged in";
       header('location: index.php');
  }
 }
 // ...
 if (isset($_POST['login_user'])) {
 // $username = mysqli_real_escape_string($db, $_POST['username']);
 // $password = mysqli_real_escape_string($db, $_POST['password_1']);
 $username = $_POST['username'];
 $password_1 = $_POST['password_1'];
/*
  $id = $_POST['id'];
  $nama = $_POST['nama'];
  $alamat = $_POST['alamat'];
  $jk = $_POST['jenis_kelamin'];
  $agama = $_POST['agama'];
  $sekolah = $_POST['sekolah_asal'];
*/
  if (empty($username)) {
       array_push($errors, "Username is required");
  }
  if (empty($password_1)) {
       array_push($errors, "Password is required");
  }
  if (count($errors) == 0) {
       $password = md5($password);
       $query = "SELECT * FROM login_siswa WHERE username='$username' AND password_1='$password_1'";
       $results = mysqli_query($db, $query);
       if (mysqli_num_rows($results) == 1) {
        $_SESSION['username'] = $username;
        $_SESSION['success'] = "You are now logged in";
        header('location: index.php');
       }else {
            array_push($errors, "Wrong username/password combination");
       }
  }
 }
 ?>