This is the login.php





<?php

require 'addons/config.php';
session_start();
if(isset($_POST['submit'])){

    $username = $_POST['username'];
    $username = mysqli_real_escape_string($conn, $username);

    $password = $_POST['password'];
    $password = mysqli_real_escape_string($conn, $password);

    $query = "SELECT * FROM users WHERE username='$username' AND password='".md5($password)."'";
    $result = mysqli_query($conn, $query) or die (mysqli_error());
    $rows = mysqli_num_rows($result);
    if($rows==1){
        $_SESSION['username'] = $username;
        $_POST['email'] = $email;
        header("location: dashboard/home.php");
    }else{
        header("location: error/log_error.php");
    }
}


?>


 <button onclick="document.getElementById('id02').style.display='block'" style="width:auto;">Login</button>

 <div id="id02" class="modal">

   <form class="modal-content animate" action="#" method="post">

     <div class="container">
       <label><b>Username</b></label>
       <input type="text" placeholder="Enter Username" name="username" required>

       <label><b>Password</b></label>
       <input type="password" placeholder="Enter Password" name="password" required>

       <button type="submit" name="submit" value="login">Login</button>
       <input type="checkbox" checked="checked"> Remember me
     </div>

     <div class="container" style="background-color:#f1f1f1">
       <button type="button" onclick="document.getElementById('id02').style.display='none'" class="cancelbtn">Cancel</button>
     </div>
   </form>
 </div>

 <script>
 // Get the modal
 var modal = document.getElementById('id02');

 // When the user clicks anywhere outside of the modal, close it
 window.onclick = function(event) {
     if (event.target == modal) {
         modal.style.display = "none";
     }
 }
 </script>

<?php
    include '../addons/config.php';
  include ('../inc/auth.php');

?>

<p>Welcome back <?php echo $_SESSION['username']; ?>!</p>
<p>Your email is <?php echo $_POST['email']; ?>!</p>





<a href="../addons/logout.php">Log off</a>

<?php
session_start();
if(!isset($_SESSION["username"])){
header("Location: ../index.php");
exit();
}
?>

<?php


#

// Create connection
$conn = mysqli_connect("localhost", "root", "", "database");
// Check connection

if($conn->connect_error){
  die("Can`t connect to database: " . $conn->connect_error);
}


 ?>