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

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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>

<?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>

</head>

<body>

<?php if(isset($err)){ echo $err; } ?>

User Name: <input name="username" size="20" type="text" />

Pass Word: <input name="password" size="20" type="password" />

</form>

</center>

</body>

</html>

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