index.php

<?php
/* Mulai session */
session_start();

/* Panggil file fungsi.php */
require_once( 'fungsi.php' );

/* Jika tombol DAFTAR diklik */
if( $action == 'DAFTAR' ) {
  /* Variable untuk menyimpan data kesalahan */
  $salah = array();

  /* cek seluruh data yang dikirimkan dari form */
  $username = clean( $_POST['username'] );
  $fullname = clean( $_POST['fullname'] );
  $password = clean( $_POST['password'] );
  $email = clean( $_POST['email'] );
  $time = time();

  if( empty( $username ) ) {
    $salah[] = '- Username tidak boleh kosong';
  }
  if( empty( $fullname ) ) {
    $salah[] = '- Nama tidak boleh kosong';
  }
  if( empty( $password ) ) {
    $salah[] = '- Password tidak boleh kosong';
  }
  if(empty( $email ) ) {
    $salah[] = '- Email tidak boleh kosong';
  }

  /* Jika tidak ada kesalahan */
  if( !count( $salah ) ) {
    if( num( query( "SELECT * FROM user WHERE username='$username' OR email='$email'" ) ) == 0 ) {
      $password = md5( $password );
      query( "INSERT INTO user VALUES( '$uid', '$username', '$fullname', '$password', '$email', '$time', '$time', '0' )" );
    } else {
      $salah[] = '- Anggota dengan username dan email ini sudah terdaftar. Pilih yang lain coy...';
    }
  }

  /* Simpan data kesalahan dalam session */
  if( count( $salah ) ) {
    $_SESSION['salah-daftar']['duplikasi-akun'] = implode( '<br>', $salah );
  }

  /* Kirimkan ke halaman yang sesuai */
  if( count( $salah ) ) {
    header( "Location: index.php?page=daftar" );
  } else {
    header( "Location: index.php?page=login" );
  }
  exit;
} elseif( $action == 'LOGIN PENGGUNA' ) {
  /* Jika tombol Login Pengguna diklik */
  $salah = array();
  $emailusername = clean( $_POST['emailusername'] );
  $password = clean( $_POST['password'] );
  if( empty( $emailusername ) ) {
    $salah[] = '- Isi username atau email Anda';
  }
  if( empty( $password ) ) {
    $salah[] = '- Isi password Anda';
  }
  if( !count( $salah ) ) {
    $row = fetch( query( "SELECT * FROM user WHERE username='$emailusername' OR email='$emailusername' AND password='".md5( $password )."'" ) );
    if( $row) {
      $_SESSION['uid'] = $row['uid'];
      query( "UPDATE user SET status='1' WHERE uid='".$row['uid']."'" );
    } else {
      $salah[] = '- Maaf, password Anda salah';
    }
  }
  if( count( $salah ) ) {
    $_SESSION['login-gagal']['password-salah'] = implode( '<br>', $salah );
  }
  if( count( $salah ) ) {
    header( "Location: index.php?page=login" );
  } else {
    header( "Location: index.php" );
  }
  exit;
} elseif( $page == 'logout' ) {
  /* Jika link logout diklik */
  query("UPDATE user SET lastup_date='".time()."',status='0' WHERE uid='".$_SESSION['uid']."'" );
  session_start();
  session_destroy();
  header( "Location: index.php" );
  exit;
}

?>

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>Fitur Login dengan PHP & MySQL</title>
        <link href="css/style.css" type="text/css" media="screen" rel="stylesheet"/>
    </head>
    <body>

        <h1>Welcome to The Jungle</h1>
        <ul>
            <li><a href="index.php">Beranda</a></li>
            <li><a href="index.php?page=daftar">Daftar Gratis</a></li>
        <?php
            if (isset($_SESSION['uid'])){
                echo "<li><a href=\"index.php?page=logout\">Logout</a></li>";
            }else {
                echo "<li><a href=\"index.php?page=login\">Login</a></li>";
            }
            ?>
        </ul>
        <hr>

<?php
            /*Jika link daftar diklik*/
            if ($page == 'daftar'){
                echo "<h1>Daftar Gratis</h1>";

                /*Jika ada kesalahan yang terakam oleh
                 * browser selama pendaftaran
                 */
                if(isset($_SESSION['salah-daftar']['duplikasi-akun'])){
                    echo "<p class=\"error\">".$_SESSION['salah-daftar']['duplikasi-akun']."</p>";
                    unset($_SESSION['salah-daftar']['duplikasi-akun']);
                }
echo "<form method=\"post\" action=\"\">";
echo "<p>Username Anda:<br><input type=\"text\" name=\"username\" size=\"50\"></p>";
echo "<p>Nama Anda:<br><input type=\"text\" name=\"fullname\" size=\"50\"></p>";
echo "<p>Password Anda:<br><input type=\"password\" name=\"password\" size=\"50\"></p>";
echo "<p>Email Anda:<br><input type=\"text\" name=\"email\" size=\"50\"></p>";
echo "<p><input type=\"submit\" name=\"action\" value=\"DAFTAR\"></p>";
echo "</form>";
}elseif ($page == 'login'){
/*Jika link login diklik*/
echo "<h1>Login Pengguna</h1>";

                /*Jika ada kelasalahan
                 * yang terekam selama proses login
                 */
                if(isset($_SESSION['login-gagal']['password-salah'])){
                    echo "<p class=\"error\">".$_SESSION['login-gagal']['password-salah']."</p>";
                    unset($_SESSION['login-gagal']['password-salah']);
                }

  echo "<form method=\"post\" action=\"\">";
  echo "  <p>Username/email:<br> <input type=\"text\" name=\"emailusername\" size=\"30\"></p>";
  echo "  <p>Password:<br> <input type=\"password\" name=\"password\" size=\"30\"></p>";
  echo "  <p><input type=\"submit\" name=\"action\" value=\"LOGIN PENGGUNA\"></p>";
  echo "</form>";
} else {
  /* Jika ada user yang login */
  if( isset( $_SESSION['uid'] ) ) {
    $sql = fetch( query( "SELECT * FROM user WHERE uid='".$_SESSION['uid']."'" ) );
    echo "<h1>Welcome, ".$sql['fullname']." | <a href=\"index.php?page=logout\">Logout</a></h1>";
    echo "<p>Selamat datang di halaman utama, <b>".$sql['fullname']."</b> | Tanggal daftar: ".date( "d-m-Y H:i", $sql['member_date'] ).", terakhir kali login: ".date( "d-m-Y H:i", $sql['lastup_date'] )."</p>";
    echo "<p>Untuk menu selanjutnya sedang dalam pengembangan. Silahkan tunggu info selanjutnya dari webmaster.</p>";
  } else {
    /* Jika tidak ada member yang login */
    echo "<h1>Hello</h1>";
    echo "<p>Test..Test..test..</p>";
  }

}


?>