<form action="inscription.php" method="post">

<?php
 // on teste si le visiteur a soumis le formulaire  
if (isset($_POST['inscription']) && $_POST['inscription'] == 'Inscription') { 
   // on teste l'existence de nos variables. On teste également si elles ne sont pas vides 
  if ((isset($_POST['nom']) && !empty($_POST['nom']))&& (isset($_POST['prenom']) && !empty($_POST['prenom']))&& (isset($_POST['e_mail']) && !empty($_POST['e_mail']))&& (isset($_POST['login']) && !empty($_POST['login'])) && (isset($_POST['pass']) && !empty($_POST['pass'])) && (isset($_POST['pass_confirm']) && !empty($_POST['pass_confirm']))) { 
    // on teste les deux mots de passe 
     if ($_POST['pass'] != $_POST['pass_confirm']) { 
        $erreur = 'Les 2 mots de passe sont différents.'; 
  // connection à la base de lespinasse_tennis
       $base = mysql_connect ('localhost', 'xxxxxx', 'xxxxx'); 
      mysql_select_db ('xxxxxx', $db); 
       
    // on recherche si ce login est déjà utilisé par un autre membre 
         $sql = 'SELECT count(*) FROM membre WHERE login="'.mysql_escape_string($_POST['login']).'"'; 
          $req = mysql_query($sql) or die('Erreur SQL !<br />'.$sql.'<br />'.mysql_error()); 
         $data = mysql_fetch_array($req); 

      if ($data[0] == 0) { 
         $sql = 'INSERT INTO membre VALUES("", "'.mysql_escape_string($_POST['nom']).'","'.mysql_escape_string($_POST['prenom']).'","'.mysql_escape_string($_POST['e_mail']).'","'.mysql_escape_string($_POST['login']).'", "'.md5(mysql_escape_string($_POST['pass'])).'")'; 
         mysql_query($sql) or die('Erreur SQL !'.$sql.'<br />'.mysql_error()); 
 session_start(); 
          $_SESSION['login'] = $_POST['login']; 
            header('Location: administration.php'); 
          exit(); 
}
}		  
        else { 
            $erreur = 'Un membre poss&egrave;de d&eacute;j&agrave;
			ce login.'; 
			}
		}
	}
  else { 
    $erreur = 'Au moins un des champs est vide.'; 
    }  
 ?>

<fieldset>
   <form action="inscription.php" method="post">
    <label for="nom" class="float">Nom: </label><input type="text" name="nom" value="<?php if (isset($_POST['nom'])) echo htmlentities(trim($_POST['nom'])); ?>"><br />
	<label for="prenom" class="float"> Pr&eacute;nom: </label><input type="text" name="prenom" value="<?php if (isset($_POST['prenom'])) echo htmlentities(trim($_POST['prenom'])); ?>"><br />
	<label for="e_mail" class="float">Adresse E_Mail :</label> <input type="text" name="e_mail" value="<?php if (isset($_POST['e_mail'])) echo htmlentities(trim($_POST['e_mail'])); ?>"><br />
   <label for="login" class="float">Identifiant: </label></label><input type="text" name="login" value="<?php if (isset($_POST['login'])) echo htmlentities(trim($_POST['login'])); ?>"><br />
  <label for="pass" class="float"> Mot de passe : </label><input type="password" name="pass" value="<?php if (isset($_POST['pass'])) echo htmlentities(trim($_POST['pass'])); ?>"><br />
   <label for="pass_confirm" class="float">Confirmation du mot de passe :</label><input type="password" name="pass_confirm" value="<?php if (isset($_POST['pass_confirm'])) echo htmlentities(trim($_POST['pass_confirm'])); ?>"><br />
    </fieldset>
	 <fieldset><p>
   <div class="center"><input type="submit" name="inscription" value="Inscription"></p></div>
  </fieldset>
   </form>
  <?php
if (isset($erreur)) echo '<br />',$erreur;  
?>