Untitled

<!DOCTYPE html>
<html>
  <head>
  	<link href="styles/style.css" rel="stylesheet" type="text/css">
  	<link href="styles/background.css" rel="stylesheet" type="text/css">
        <link href="styles/body.css" rel="stylesheet" type="text/css">
        <link href="styles/title.css" rel="stylesheet" type="text/css">
        <link href="styles/head.css" rel="stylesheet" type="text/css">
        <link href="styles/menu.css" rel="stylesheet" type="text/css">
                <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Lobster" />

        <meta charset="utf-8">
    <title>Acceuil</title>
         <h1>
              <d> Acceuil TP </d>
         </h1>
         <br>
    <h7>
    <h7>
      <br>
<form method="post" action="ton_action">
   <p>

   </p>
</form>
    </h4>
    <br>
  </head>
  <body>
      <br>
      <d> En classe de : </d>
      <br>
      <br>
<div class='ribbon'>
  <a href='Page 1.html'><span>TP 6eme</span></a>
  <a href='Page 2.html'><span>TP 5eme</span></a>
  <a href='Page 3.html'><span>TP 4eme</span></a>
  <a href='Page 4.html'><span>TP 3eme</span></a>
</div>
  <br>
  <br>

  <?php


if(isset($_POST['submit']))

{
  $username =htmlentities(trim($_POST['username']));
  $password =htmlentities(trim($_POST['password']));
  $repeatpassword = htmlentities(trim($_POST['repeatpassword']));
    if($username&&$password&&$repeatpassword)
    {
      if($password==$repeatpassword)
      {
        $bdd = new PDO('mysql:host=localhost;phplogin;charset=utf8', 'root', '');

        $bdd->exec('INSERT INTO user(id, username, password) VALUES(NULL, \'$username\', \'$password\')');
        $reponse = $bdd->query('SELECT * FROM user');


        die("Inscription terminée,connéctez vous");
      }else echo"Les deux mots de passe doivent être identique";

    }else echo"Veuillez saisir tout les champs";
}


  ?>

<form method="POST" action="register.php">
  <p> Votre identifiant :</p>
  <input type="text" name="username">
  <p> Mot de passe :</p>
  <input type="password" name="password">
  <p> Repetez votre mot de passe </p>
  <input type="password" name="repeatpassword">
  <input type="submit" value="S'inscrire" name="submit">
  </body>
</html>