07 Mar 2015
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Day 22: Login and Logout Functionality With OOPs.

Posted in PHP, PHP step by step tutorials By bestonetechnologies On March 7, 2015

This article is about login and logout functionality with OOPs.

There are 4 files used in this script:

1. adminCls.php Class to define member variable and functions related to Admin.

2. index.php is basically a login form, contains html and object of admin class.

3. dashboard.php it’s a secure page and available after successful login.

4. logout.php destination of logout link, session will destroy with this page and after that user will redirected to index page.

Program 65: Creation of Class

<?php
@session_start();
$con = mysql_connect(‘localhost’,’root’,”);
mysql_select_db(“mydb”,$con);
class adminCls {
var $id;
var $username;
var $password;
function login() {
$query = “select id,password from tbl_admin where username = ‘$this->username'”;
$res = mysql_query($query);
$data = mysql_fetch_array($res);
if(isset($data[‘password’]) && ($data[‘password’] == $this->password)) {
$_SESSION[‘user’] = $data[‘id’];
return true;
} else {
return false;
}
}
function logout(){
@session_start();
session_destroy();
@header(“location:index.php”);
}
}
?>

Program 66: Index Page

<?php
include_once “adminCls.php”;
$msg = “”;
$objAdmin = new adminCls();
if(isset($_REQUEST[‘btnLogin’])) {
$objAdmin->username = trim($_REQUEST[‘txtUser’]);
$objAdmin->password = trim($_REQUEST[‘txtPassword’]);
if($objAdmin->username!=”” && $objAdmin->password!=””) {
$res = $objAdmin->login();
if($res) {
@header(“location:dashboard.php”);
} else {
$msg = “Username or Password mismatch!”;
}
} else {
$msg = “Please enter valid username and password!”;
}
}
?>
<html>
<head><title>login</title></head>
<body>
<form method=”POST”>
<table cellspacing=”10″ align=”center” style=”border:solid 1px; padding:20px; margin-top:200px;”>
<tr><th colspan=”2″><font color=”red”><?php echo $msg; ?></font></th></tr>
<tr>
<td>Username</td> <td> <input name=”txtUser” placeholder=”username” type=”text”/> </td>
</tr>
<tr>
<td>Password</td> <td> <input name=”txtPassword” placeholder=”password” type=”password”/> </td>
</tr>
<tr>
<td></td> <td> <input name=”btnLogin” type=”submit” value=”LOGIN”/> </td>
</tr>
</table>
</form>
</body>
</html>

Program 67: Secure Dashboard Page After Login

<?php
@session_start();
if(isset($_SESSION[‘user’]) && $_SESSION[‘user’] > 0) {
echo “<h3>Welcome To Dashboard</h3>”;
} else {
@header(“location:index.php”);
}
?>
<html>
<body>
<a href=”logout.php”>Logout</a>
</body>
</html>

Program 64: Logout functionality

<?php
include_once “adminCls.php”;
$objAdmin = new adminCls();
$objAdmin->logout();
?>

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bestonetechnologies

I am a software developer.

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