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<html lang="de">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <link href="css/fail.css" rel="stylesheet">

    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>
  <body>


    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="js/bootstrap.min.js"></script>
  </body>
</html>

<?php
session_start();
include_once("db.php");


$l_name = $_POST["l_username"];
$l_pw = $_POST["l_password"];

$query = "SELECT * FROM user WHERE username = '".$l_name."'";
$result = mysqli_query($db,$query);

while ($row = mysqli_fetch_object($result)) {

  $li_name = $row->username;
  $li_pw = $row->password;
}

if(mysqli_num_rows($result) == 0)// Kein User vorhanden
{

  ?>
  <html>
  <body>

  <div class="bs-example">
    <div class="alert alert-danger alert-error">
        <strong>Fehler!</strong> Benutzer wurde nicht gefunden!<br>
        <a href="login.html" class = "alert-link"><i>Hier klicken, falls du nicht automatisch weitergeleitet wirst!</i>
    </div>
  </div>
  </body>

  </html>

  <?php
   header("Refresh:5; url=login.html", true, 303);
}

if($li_pw != $l_pw){ // Passwort stimmt nicht
  ?>
  <html>
  <body>

  <div class="bs-example">
    <div class="alert alert-danger alert-error">
        <strong>Fehler!</strong> Falsches Passwort eingegeben!<br>
        <a href="login.html" class = "alert-link"><i>Hier klicken, falls du nicht automatisch weitergeleitet wirst!</i>
    </div>
  </div>
  </body>

  </html>

  <?php
   header("Refresh:5; url=login.html", true, 303);

}
else{
  $_SESSION["loggedname"] = $li_name;
  ?>
  <html>
  <body>

  <div class="bs-example">
    <div class="alert alert-success">
       Erfolgreich eingeloggt!<br>
        <a href="login.html" class = "alert-link"><i>Hier klicken, falls du nicht automatisch weitergeleitet wirst!</i>
    </div>
  </div>
  </body>

  </html>

  <?php
   header("Refresh:5; url=main.php", true, 303);
}


  ?>