Code du formulaire (sans mise en forme)

<form method="POST" action="formulaire02_post.php">
  <label>Année</label>
  <!-- zones bouton radio -->
  <input type="radio" name="radAnnee" value="2">
  L 2 
  <input type="radio" name="radAnnee" value="31">
  L 3 
  <input type="radio" name="radAnnee" value="4" checked>
  M 1 
  <input type="radio" name="radAnnee" value="5">
  M 2
  <!-- boutons -->
  <input type="reset" name="btnReset" value=" Effacer ">
  <input type="submit" name="btnSubmit" value="Envoyer">
</form>