php session Archives - Developer Desks

Php tutorials May 21, 2015

Php code for login page using session without stored details in database

For Previous chapter we already know what is session and how to set and destroy.

So here, We are going to learn how to using PHP code for login page using session without stored details in database.

Php code for login page using session

Example
1. First Create login page and named as Index.php
Code

<?php
session_start();    // Session start

if(isset($_POST['check']))    // Check form submit with IF Isset function
{
$username="admin";    // set variable value
$password="123";        // set variable value
if($_POST['username']==$username && $_POST['password']==$password)   // Check Given user name, password and Variable user name password are same
{
$_SESSION['username']=$username;    // set session from given user name
header('location:mainpage.php');
}
else
{
$err="Authentication Failed Try again!";
}
}
?>

<html>
<head>
<title>Main Page</title>
</head>
<body>
<Center>
<?php if(isset($err)){ echo $err; } ?>      <!-- Print Error -->

<form method="POST" name="loginauth" target="_self">

User Name: <input name="username" size="20" type="text" />
<br/><br/>
Pass Word: <input name="password" size="20" type="password" />
<br/><br/>
<input name="check" type="submit" value="Authenticate" />

</form>
</center>
</body>
</html>

Explanation
This index.php page will Set username and password as “admin” and “123”.
Check whether given user name and password is correct or wrong.
If the given username and password is correct. Set $_SESSION variables as username and redirect to mainpage.php

2. Second Create mainpage.php
Code

<?php
session_start();    //session start
if(!isset($_SESSION['username']))     //if session not found redirect to homepage
{
header('location:index.php');
}
echo "Welcome &nbsp;";
echo $_SESSION['username'];      //retrieved using session
?>

<html>
<head>
</head>
<body>
<center>
<h2>Welcome to Main page</h2>
<a href="logout.php">logout</a>
</center>
</body>
</html>

Explanation
Session variable retrieve the session value from index.php page to this page.

HINT : We can Use many number of pages with session variables.

<?php
session_start();    //session start
if(!isset($_SESSION['username']))     //if session not found redirect to homepage
{
header('location:index.php');
}
echo "Welcome &nbsp;";
echo $_SESSION['username'];      //retrieved using session
?>

simply place this in the top of the page.

3. Create logout.php page for destroy the session or unset the session

<?php
session_start();
if(!isset($_SESSION['username']))     //if session not found redirect to homepage
{
header('location:index.php');
}
unset($_SESSION['username']);       // Session Found Unset the variable values
session_destroy();                  // Destroy the session
header('location:index.php');
?>

Explanation
When you click Logout.php its check the session and unset the variable values and destroy the session

Developer desks- session – Full code Download here

To know Login With session in php using stored data in MySQL database here

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Php tutorials May 21, 2015

Php code for login page with database using session

For Previous chapter we learn how to create login-page-using-session-without-stored-details-in-database, Here We go to lear how we use login page with session using mysql database

php code for login page with database

First you have a knowledge in mysql with CURD(Create, Update, Read, Delete) Syntax. If you had then Go.

Step 1:
Run Xampp Server, Create Database ‘Developers’ in Localhost/phpmydamin.
step 2:
Create table (copy and paste )

CREATE TABLE IF NOT EXISTS `admin` (
`Sid` int(11) NOT NULL,
`User` varchar(20) NOT NULL,
`email` varchar(30) NOT NULL,
`Password` varchar(20) NOT NULL,
`phone` varchar(20) NOT NULL,
`Aid` int(11) NOT NULL
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=latin1; &nbsp; &nbsp; &nbsp; &nbsp; // create table

INSERT INTO `admin` (`Sid`, `User`, `email`, `Password`, `phone`, `Aid`) VALUES
(1, 'Admin', 'developerdesks@gmail.com', 'admin@123', '9876543210', 1); &nbsp; &nbsp; &nbsp; &nbsp; // values inserted in db

Step 3:
Create Config file named as config.php

<?php
$mysql_hostname = "localhost";
$mysql_user = "root";                         // default username in localhost is "root"
$mysql_password = "";                        //password as null
$mysql_database = "developer";               // Db name

$bd = mysql_connect($mysql_hostname, $mysql_user, $mysql_password) or die("Could not connect database");
mysql_select_db($mysql_database, $bd) or die("Could not select database");

?>

Step 4:

Create login page and named as Index.php

<?php
session_start();                              // Session start
include 'config.php';                         // Config for database connection
if(isset($_POST['check']))                    // Check form submit with IF Isset function
{
$username =$_POST['username'];                // set username to variable
$password =$_POST['password'];                //set password to variable
$result = mysql_query("SELECT * FROM `admin` WHERE `User`=’$username’ AND Password=’$password'");               //check from database
if(mysql_num_rows ($result) > 0 )
{
$_SESSION['username'] = $username;            // set session name
$_SESSION['password'] = $password;
header('location:mainpage.php');
}
else
{
$err="Authentication Failed Try again!";
}
}
?>
<html>
<head>
<title>Main Page</title>
</head>
<body>
<Center>
<?php if(isset($err)){ echo $err; } ?> <!– Print Error –>

<form method="POST" name="loginauth" target="_self">

User Name: <input name="username" size="20" type="text" />
<br/><br/>
Pass Word: <input name="password" size="20" type="password" />
<br/><br/>
<input name="check" type="submit" value="Authenticate" />
</form>
</center>
</body>
</html>

Step 5:

Create mainpage.php

Code

<?php
session_start();
if((!isset ($_SESSION['username']) == true) and (!isset ($_SESSION['password']) == true))             // check session condition
{
unset($_SESSION['username']);                                
unset($_SESSION['password']);
header('location:index.php');
}
$logged = $_SESSION['username'];
?>
<html>
<head>
</head>
<body>
<center>
<h2>Welcome to Main page</h2><h3> Here we go with <a href="Secondpage.php">Second page </a></h3>
<a href=”logout.php”>logout</a>
</center>
</body>
</html>

Explanation

This index.php page will set username and password as “Admin” and “admin@123”.
Check whether given user name and password is correct or wrong.
If the given username and password is correct. Set $_SESSION variable as username and redirect to mainpage.php

HINT : We can Use many number of pages with session variables.

<?php
session_start();
if((!isset ($_SESSION['username']) == true) and (!isset ($_SESSION['password']) == true))
{
unset($_SESSION['username']);
unset($_SESSION['password']);
header('location:login.php');
}
$logged = $_SESSION['username'];
?>

simply place this in the top of the page.

Step 6:
Create logout.php page for destroy the session or unset the session

<?php
session_start();
if(!isset($_SESSION['username']))
{
header('location:index.php');
}
unset($_SESSION['username']);
session_destroy();
header('location:login.php');
?>

Explanation

When you click Logout.php its check the session and unset the variable values and destroy the session

Step 7 :
Create Secondpage.php
Code

<?php

session_start();
if((!isset ($_SESSION['username']) == true) and (!isset ($_SESSION['password']) == true))
{
unset($_SESSION['username']);
unset($_SESSION['password']);
header('location:login.php');
}
$logged = $_SESSION['username'];
?>

<html>
<head>
</head>
<body>
<center>
<h2>Welcome to Second page</h2>

<p>This page is the second page having session name "<?php echo $logged; ?>"
<a href=”logout.php”>logout</a>
</center>
</body>
</html>

Explanation:

The Secondpage.php is the another page with same session. It is used to learn how the session stored the variables in multiple page

This is the simple login form with stored and retrived session data’s from server database.
Enjoy the code.

Php session with database – Full code download here

Keep Reading

Php tutorials May 21, 2015

How to Handle session variables in Php

Session is nothing but way to store a details or information (using variables) in multiple pages. Its Not like as Cookie.
The difference is details are not stored in the computer browser as like as cookie.

What is PHP Session? – Simple and clear Explanation

When You open a page in the browser. It have a login page. you logged in. browse some pages, update some changes and do all thing and closed it. From Your computer, know this who you are, what you do, where is it. But from Internet or server don’t know about all things. because the HTTP address doesn’t maintain state.

Here session works. It stored all login details or any information using session variable. It will carry the details to all the pages, links, update contents and changes until you unset or destroy the session. which means until you log-out or close the browser.

Syntax – how to start a Session
session_start(); // Session syntax

Session Variables is globally declared as $_SESSION // variable syntax

Example

<?php
session_start();  // Start the session sysntax

$_SESSION["developer"] = "php "; // Session variable declared
$_SESSION["desks"] = "Html";   // Session variable declared

echo "We are learning " . $_SESSION["developer"] . ".<br>";      // Print session variable values
echo "We are also learning " . $_SESSION["desks"] . ".";    // Print session variable values

?>

Output :

We are learning php
We are also learning Hmtl

Here You can call the session variable where you want.

Print all session in single output
We can also Print all the Session in single array function
Syntax

<?php
session_start(); // Start the session sysntax
$_SESSION["developer"] = "php "; // Session variable declared
$_SESSION["desks"] = "Html"; // Session variable declared
print_r($_SESSION);
?>

output

Array ( [developer] => php [desks] => Html )

Modify the session variable
We can also modify the session variable where u want and when you want. It print last modified value only

<?php
session_start();  // Start the session sysntax
$_SESSION["developer"] = "php "; // Session variable declared
$_SESSION["desks"] = "Html";   // Session variable declared
$_SESSION["developer"] = "WELCOME";   // Simple modify the session variable
echo "We are learning " . $_SESSION["developer"] . ".<br>";      // Print session variable values
echo "We are also learning " . $_SESSION["desks"] . ".";    // Print session variable values
?>

Output

We are learning WELCOME // Session variable print the last modified values
We are also learning Hmtl

Destroy or Unset the session variable
Want to remove all global session variables and destroy the session, we can use session_unset() and session_destroy():
Syntax:

<?php
session_start(); // Start the session sysntax
$_SESSION["developer"] = "php "; // Session variable declared
$_SESSION["desks"] = "Html"; // Session variable declared
$_SESSION["developer"] = "welcome";
session_unset();  // Session unset used to remove all the variables in the session
session_destroy();  // Delete or End the session
echo "We are learning " . $_SESSION["developer"] . ".<br>"; // Print session variable values
echo "We are also learning " . $_SESSION["desks"] . "."; // Print session variable values
?>

If you run this code in your browser

Output
Notice: Undefined index: developer in you URL
We are learning .

Notice: Undefined index: desks in you URL
We are also learning .

Because variables are unset and destroyed.

Want to see the real time session variables functions work in multiple pages Click Here

Login page using session, user details with out stored in database

Like this session some related functions also in php they are like cookie() and local storage()

LOCAL STORAGE

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