PHP - Simple Login with md5

Submitted by razormist on Tuesday, May 7, 2019 - 22:21.

In this tutorial we will create a Simple Login with md5 using PHP. This code can protect the user login information by encrypting the password value. The code use a special php built-in function md5() a very strong encrypting tool that protect the user password by just passing the string in order to ultimately encrypt into a powerful password. We will be using PHP as a scripting language and interpreter that is used primarily on any webserver including xamp, wamp, etc. It is being use to any famous websites and it has a modern technology that can easily be use by the next generation.

Getting Started:

First you have to download & install XAMPP or any local server that run PHP scripts. Here's the link for XAMPP server https://www.apachefriends.org/index.html. And, this is the link for the bootstrap that i used for the layout design https://getbootstrap.com/.

Creating Database

Open your database web server then create a database name in it db_md5, after that click Import then locate the database file inside the folder of the application then click ok. tut1

Creating the database connection

Open your any kind of text editor(notepad++, etc..). Then just copy/paste the code below then name it conn.php.

<?php
        $conn = mysqli_connect("localhost", "root", "", "db_password");
        
        if(!$conn){
                die("Error: Failed to connect to database!");
        }
?>

Creating The Interface

This is where we will create a simple form for our application. To create the forms simply copy and write it into your text editor, then save it as shown below. index.php

<!DOCTYPE html>
<html lang="en">
        <head>
                <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
                <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        </head>
<body>
        <nav class="navbar navbar-default">
                <div class="container-fluid">
                        <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
                </div>
        </nav>
        <div class="col-md-3"></div>
        <div class="col-md-6 well">
                <h3 class="text-primary">PHP - Simple Login with md5</h3>
                <hr style="border-top:1px dotted #ccc;"/>
                <div class="col-md-3">
                        <h5>DEFAULT USER</h4>
                        <h6>Username: admin</h6>
                        <h6>Password: admin</h6>
                </div>
                <div class="col-md-6">
                        <form method="POST"     >       
                                <div class="form-group">
                                        <label>Username</label>
                                        <input type="text" name="username" maxlength="50" class="form-control" required="required"/>
                                </div>
                                <div class="form-group">
                                        <label>Password</label>
                                        <input type="password" name="password" maxlength="12" class="form-control" required="required"/>
                                </div>
                                <?php include 'login.php'?>
                                <center><button class="btn btn-primary" name="login"><span class="glyphicon glyphicon-log-in"></span> Login</button></center>
                        </form> 
                </div>
        </div>
</body> 
</html>

home.php

<!DOCTYPE html>
<?php
        session_start();
        require_once 'conn.php';
        
        if(!ISSET($_SESSION['user_id'])){
                header('location: index.php');
        }
?>
<html lang="en">
        <head>
                <meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
                <link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
        </head>
<body>
        <nav class="navbar navbar-default">
                <div class="container-fluid">
                        <a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
                </div>
        </nav>
        <div class="col-md-3"></div>
        <div class="col-md-6 well">
                <h3 class="text-primary">PHP - Simple Login with md5</h3>
                <hr style="border-top:1px dotted #ccc;"/>
                <?php
                        $query=mysqli_query($conn, "SELECT * FROM `user` WHERE `user_id`='$_SESSION[user_id]'") or die(mysqli_error());
                        $fetch=mysqli_fetch_array($query);
                ?>
                
                <div class="col-md-3"></div>
                <div class="col-md-6">
                        <h1>WELCOME</h1>
                        <h3 class="text-primary"><?php echo $fetch['name']?></h3>
                        <a href="logout.php" class="btn btn-primary"><span class="glyphicon glyphicon-log-out"></span> Logout</a>
                </div>
        </div>
</body> 
</html>

Creating the Main Function

This code contains the minor function of the application. This code will allow the user to login with a md5 encrypted protection. To do this just kindly write these block of codes inside the text editor, then save it as shown below. login.php

<?php
        session_start();
        
        require_once 'conn.php';
        
        if(ISSET($_POST['login'])){
                $username = $_POST['username'];
                $password = md5($_POST['password']);
                
                $query = mysqli_query($conn, "SELECT * FROM `user` WHERE `username` = '$username' && `password` = '$password'") or die(mysqli_error());
                $rows = mysqli_num_rows($query);
                $fetch = mysqli_fetch_array($query);
                
                if($rows > 0){
                        $_SESSION['user_id'] = $fetch['user_id'];
                        header("location: home.php");
                }else{
                        echo "<center><label class='text-danger'>Invalid username or password!</label></center>";
                }
        }
?>

logout.php

<?php
        session_start();
        unset($_SESSION['user_id']);
        header("location: index.php");
?>

There you have it we successfully created a Simple Login with md5 using PHP. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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