<?php
session_start();
$db=mysqli_connect("localhost","root","","register");

if(isset($_POST['register'])){
session_start();

$username=mysqli_real_escape_string($db,$_POST['username']);
$email=mysqli_real_escape_string($db,$_POST['email']);
$password=mysqli_real_escape_string($db,$_POST['password']);

    $password =md5($password);
    $sql = "INSERT INTO users(username,email,password)
    VALUES('$username', '$email', '$password')";
    mysqli_query($db, $sql);
    $_SESSION['message'] = " You are now logged in";
    $_SESSION['username'] = $username;
    header("location: Login.php");
}
?>

form method="post"  action="Registration.php">
    <table>
        <tr>
            <td>Username:</td>
            <td><input type="text" name="username" class="textInput"></td>
        </tr>

        <tr>
            <td>Email:</td>
            <td><input type="email" name="email" class="textInput"></td>
        </tr>

        <tr>
            <td>Password:</td>
            <td><input type="password" name="password" class="textInput"></td>
        </tr>

        <tr>
            <td></td>
            <td><input type="submit" name="register"Value="Register"></td>
        </tr>
    </table>
</form>