aaa kontroll aaaaaa

<?php
  session_start();
  if(!isset($_SESSION["benutzername"])){
    header("Location: login.php");
  }

  $out3 = "";

  if(isset($_POST["posten"])) {

    $server = "localhost";
    $usr = "root";
    $passwd = "root";
    $datab = "nera";

    $conn2 = mysqli_connect($server, $usr, $passwd, $datab);

    if(!$conn2){
      die("Connection 2 failed:" .mysqli_connect_error());
    }

    $post = $_POST["status"];
    $benutzer = $_SESSION["benutzername"];
    $sql2 = "INSERT INTO post (FIBenutzer, Post) VALUES ('$benutzer','$post')";

    $result2 = mysqli_query($conn2, $sql2);

    if(!$result2){
      die("Die Abfrage konnte nicht ausgeführt werden:" . mysqli_error($conn2));
    }

    mysqli_close($conn2);
  }


    $servername = "localhost";
    $user = "root";
    $password = "root";
    $database = "nera";

    $conn = mysqli_connect($servername, $user, $password, $database) or die("Connection failed:" .mysqli_connect_error());

    $sql = "SELECT IDPost, FIBenutzer, Post FROM post WHERE FIBenutzer = '{$_SESSION["benutzername"]}'";

    $result = mysqli_query($conn, $sql) or die("Failure" .mysqli_error($conn));

    $benutzer = $_SESSION["benutzername"];

      $out3 = "<table border='1'>";
      $out3 .= "<th>Benutzer</th><th>Posts</th>";
      while($row = mysqli_fetch_assoc($result)) {
        $out3 .= "<tr><td>$benutzer</td><td>{$row["Post"]}</td></tr>";
      }
      $out3 .= "</table>";


    mysqli_close($conn);


?>
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Startseite</title>
    <link rel="stylesheet" type="text/css" href="style.css">
  </head>
  <body>
    <h1>NERA</h1>
    <div class="menu">
      <a href="logoff.php"><h4>Abmelden</h4></a>
      <a href="profil.php"><h4>Profil</h4></a>
    </div>

    <div class="bild">
      <?php if(!isset($profilbild)){
        echo "<a href='profil.php'><img src='nkb.jpg' id='bild'></a>";
      } ?>
    </div>


    <div class="index">
      <form method="post">
        <input type="textarea" name="status" autofocus placeholder="Poste etwas..">
    </div>
        <input type="submit" name="posten" value="Posten">
      </form>
      <p><h2>Posts</h2></p>
      <?php echo $out3; ?>
  </body>

</html>