PHP Login without DataBase

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How to create a simple PHP login system without a database.
To create a simplified authentication system in PHP without a database we will guide you through a few simple steps:

Creating an HTML login form.
Store user data in an array instead of the database.
Finally, protect your files by checking the session bookmark. Redirect the user to the login page if they are not logged in.

Design HTML form Login script

Consider the following examples of HTML simple login form.

Step 1: login.php

Example (this is HTML - PHP editor, change text on this window)

<form action="" method="POST" name="Login_Form">

<table width="360" border="1px" align="center" cellpadding="10px" cellspacing="1" class="Table">

<?php if(isset($msg)){?>

<tr>

<td colspan="3" align="center" valign="top"><?php echo $msg;?></td>

</tr>

<?php } ?>

<tr>

<td colspan="3" align="left"><h3>Login</h3></td>

</tr>

<tr>

<td align="right">Username</td>

<td><input name="user_name" type="text" class="Input"></td>

</tr>

<tr>

<td align="right">Password</td>

<td><input name="password" type="password" class="Input"></td>

</tr>

<tr>

<td> </td>

<td><input name="Submit" type="submit" value="Login" class="Button"></td>

</tr>

</table>

</form>

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PHP script to check the login authentication

Next at the top of the login page login.php we need to write a PHP script to check the login authentication

Step 2:

Example (this is HTML - PHP editor, change text on this window)

<?php 

  // Starts the session

  session_start();


// Check Login form submitted

  if(isset($_POST['Submit'])){

  

  

  // Define username and associated password array

  $logins = array('Nick' => '123456', 'Stanley' => 'admin', 'administrator' => 'admin1234');


// Check and assign submitted user_name and password to new variable

  $user_name = isset($_POST['user_name']) ? $_POST['user_name'] : '';

  $password = isset($_POST['password']) ? $_POST['password'] : '';
// Check user_name and password existence in defined array

  if (isset($logins[$user_name]) && $logins[$user_name] == $password){

  

  // Success: Set session variables and redirect to Protected page

  $_SESSION['UserData']['user_name']=$logins[$user_name];

  header("location:index.php");

  exit;

  } else {

  

  

  // Unsuccessful attempt: Set error message

  $msg="<span style='color:red'>Invalid Login Details</span>";

  }

  }
?>

  <form action="" method="POST" name="Login_Form">

  <table width="360" border="1px" align="center" cellpadding="10px" cellspacing="1" class="Table">

  <?php if(isset($msg)){?>

  <tr>

  <td colspan="3" align="center" valign="top"><?php echo $msg;?></td>

  </tr>

  <?php } ?>

  <tr>

  <td colspan="3" align="left"><h3>Login</h3></td>

  </tr>

  <tr>

  <td align="right">Username</td>

  <td><input name="user_name" type="text" class="Input"></td>

  </tr>

  <tr>

  <td align="right">Password</td>

  <td><input name="password" type="password" class="Input"></td>

  </tr>

  <tr>

  <td> </td>

  <td><input name="Submit" type="submit" value="Login" class="Button"></td>

  </tr>

  </table>

  </form>

PHP Login without database

Step 3:
If the login is correct, then we need to redirect the page to the protected area as index.php.
So need a protected script page too.

index.php

Example (this is HTML - PHP editor, change text on this window)

<?php 

  // Starts the session

  session_start(); 
if(!isset($_SESSION['UserData']['user_name'])){

  header("location:login.php");

  exit;

  }

  ?>

  Congratulation!<br />

  You have logged into password protected page.<br />

  <a href="logout.php">Click here</a> to Logout

logout.php

Example (this is HTML - PHP editor, change text on this window)

<?php 

  // Starts the session

  session_start();
// Destroy started session

  session_destroy();
// Redirect to login page

  header("location:login.php");
exit;

  ?>

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PHP Login without DataBase - php tutorial

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