Probleme de connexion au bdd

->

   
<?php
Bdd= new PDO('mysql: host=localhost;dbname=test' , ' root', '');
$username=$_POST['username'];
$email= $_POST['email'];
if($username AND$email){
$req= $bdd-> prepare("INSERT INTO jude(' ', username, email) VALUE (' ', $username, $email)");

$req-> execute(array(
'username'=> $username,
'email'=> $email));
}else{
echo ' veuillez remplir tous les champs'; 
?>

<from Action'' method = "post">
<table>
<td><input type= " text " name= "username " id= "username"> </td>
</br>
<td><input type= "mail" name= " mail"/> </td></br>
<td> <input type= " submit" name= "valider" >
</table> 

  <?php
  try
  {
  $bdd = new PDO('mysql:host=localhost;dbname=test', 'root', '');
  
  $bdd->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
  
  $bdd->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC);
  }
  catch(Exception $e)
  {
  die('Erreur : '.$e->getMessage());
  }

//mes variables
  $username= $_POST['username'];
  $email= $_POST['mail'];
  
  //condition
   if($username AND $email){
   $req= $bdd->prepare("INSERT INTO jude('',username, email)VALUES(' ', $username, $email)");
   $req->execute(array(
     'username'=>$username,
     'email'=>$email));
   }else{
    echo'veuillez remplir tous les champs';
    }
 ?>

<form action="" method="POST">
 <div align="center"> Formulaire de test </div> </br> </br>
 <table>
  <tr>
  <td>Nom d'utilisateur</td>
  <td><input type="text" name="username" id="username" placeholder="Username" /></td>
  </tr>
  </br></br>
  <tr>
  <td>Email</td>
  <td><input type="mail" name="mail" id="mail" placeholder="mail" /></td>
  </tr>
  </br></br>
  <td>Valider</td>
  <td><input type="submit" name="Enregister" id=" valider" placeholder=" Valider"/></td>
 </table>

<?php 
/*
* Affichage des erreurs PHP dans la page
*/
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);

/*
* Connexion à la bdd
*/
try 
{ 
  $bdd = new PDO('mysql:host=localhost;dbname=test', 'root', ''); 
  $bdd->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); 
  $bdd->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC); 
} catch(Exception $e) { 
  die('Erreur : '.$e->getMessage()); 
} 


/**
* Recuperation PROPRE des variables AVANT de les utiliser
*/
$username = !empty($_POST['username']) ? $_POST['username']: NULL; 
$email = !empty($_POST['mail']) ? $_POST['mail'] : NULL; 


//condition 
if($username AND $email){ 
  $sql = "INSERT INTO jude(username, email)VALUES(:username, :email)";
  $datas = array( ':username'=>$username,  ':email'=>$email);
  try{
    $req= $bdd->prepare($sql); 
    $res = $req->execute($datas); 
  }catch(Exception $e){
     echo "Erreur dans la requete : ".$sql . "<br>".$e->getMessage();
  }
}else{ 
  echo'veuillez remplir tous les champs'; 
} 
?> 


<div align="center"> Formulaire de test </div> </br> </br> 
  <form action="" method="POST"> 
    <table> 
      <tr> 
        <td>Nom d'utilisateur</td> 
        <td><input type="text" name="username" id="username" placeholder="Username" /></td> 
      </tr> 
      <tr> 
        <td>Email</td> 
        <td><input type="mail" name="mail" id="mail" placeholder="mail" /></td> 
      </tr> 
      <tr>
        <td>Valider</td> 
        <td><input type="submit" name="Enregister" id=" valider" placeholder=" Valider"/></td> 
      </tr>
    </table>
  </form>
</div>