Inscription sur site

<?php
if (isset($_POST['user']) && isset($_POST['pass'])) {
  echo "User correct";
}else{
?>
  <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" >
    <fieldset>
      <legend>Authentification</legend>
      <table>
        <tr><td>login</td><td><input name="user" type="text" /></td></tr>
        <tr><td>pass</td><td><input name="pass" type="text"  /></td></tr>
        <tr><td colspan="2"><input type="submit" value="Valider" /> </td></tr>
      </table>
    </fieldset>
  </form>

<?php
}
?>