Multi-User Login with PHP and Mysql

Case Study : Creating a Multi-User Login System with PHP and Mysql.

Requirements : Webserver Packages (AppServ, XAMPP, EasyPHP, etc)

Step 1 : Preparing the Database

1. Prepare a database with the name db_multiuser.
2. Create a table named tb_user, create the fields – fields like the following picture,
   

   Struktur Tabel

3. Insert some sample data to tb_user.
   INSERT INTO `db_multiuser`.`tb_user` (`id`, `username`, `password`, `tipe`) VALUES (NULL, 'ani', 'ani','admin'), (NULL, 'budi', 'budi', 'operator');

Step 2 :Create the configuration file

1. Type the following script,
   <?php
$host = "localhost";
$user = "root"; //adjust to your mysql user
$pass = ""; //i use no password in my mysql
$dbName = "db_multiuser";
mysql_connect($host, $user, $pass);
mysql_select_db($dbName)
or die ("Connect Failed : ".mysql_error());
?>
2. Save with the name connect.php
3. Explanation: connect.php is a configuration file that would link the login system that we created with mysql database.

Step 3 :Create the login form

1. Type the following script,
   <center>
<h2> <b> Login Page </b> <h2><form method="post" action="proses.php"><table border="0" align="center" cellpadding="5" cellspacing="8"><tr bgcolor="orange">
<td> UserName! </td>
<td> <input name="username" type="text"> </td>
</tr>
<tr bgcolor="orange">
<td> Password ! </td>
<td> <input name="password" type="password"> </td>
</tr>
<tr>
<td> &nbsp; </td>
<td> <input name="submit" type="submit" value="login"> </td>
</tr>
</table>
</form>
</center>
2. Save with the name formlogin.php
3. This script will display a login form for username and password fields. Consider the action="proses.php". This shows that the entries from the username and password will be processed (given the action) by proses.php file. This file will be created in the next step.

Step 4 :Create the processing file for login

1. Type the following script,
   <?php
session_start(); //startsession
include "connect.php";//get the username and password from the form
$username = $_POST['username'];
$password = $_POST['password'];
//query for retrieve the user data from database according to username in the form
$q = "SELECT * FROM tb_user WHERE username = '$username' ";
$result = mysql_query($q);
$data = mysql_fetch_array($result);
//checking the password
if ($password == $data['password']) {
//save usertype & username in the session
$_SESSION['tipe'] = $data['tipe'];
$_SESSION['username'] = $data['username'];
include "menu.php";
}
//If password doesnt match
else {
$warning = "Wrong Username / Password";
echo $warning;
}
?>
2. Save with the name proses.php

Step 5 : Make a display special for user

1. Type the following script,
   <?php
session_start();
include "connect.php";
echo "<center>";
echo "<h3> Menu </h3>";
if ($_SESSION['tipe'] == "admin") {
echo " Anda Login sebagai Admin";
}
else if ($_SESSION['tipe'] == "user") {
echo " Anda Login sebagai User";
}
?>
2. Save with the name menu.php
3. Explanation: This script will display the information in accordance with the users who are logged.

Step 6 : Running the Login System

1. Go to http://localhost/
2. Select file formlogin.php to start running the application. You will see a display like the following,
   

   Login Page

3. Set the username = ani; password = ani
4. System will display the description as follows,
   

   Admin Login

5. If you log in as an operator (username: budi; password: budi), it will display information as shown below,
   

   Operator Login

NB. Save all the php file from step 2 – step 5 into the SAME ONE folder.

Okay then, happy coding
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