correction inscription

functions/sinscrire.php

@@ -79,7 +79,7 @@ if(isset($_POST['inscription']))
             $result = mysqli_query($link, "SELECT * FROM `users` ORDER BY `id_user` DESC LIMIT 1");
             $row = mysqli_fetch_array($result);
             $max = $row['id_user'] + 1;
-            mysqli_stmt_bind_param($stmt, 'sssss', $max, $data['nom']['value'], $data['prenom']['value'], $data['email']['value'],$data['mdp']['value'],$data['anniv']['value']);
+            mysqli_stmt_bind_param($stmt, 'isssss', $max, $data['nom']['value'], $data['prenom']['value'], $data['email']['value'],$data['mdp']['value'],$data['anniv']['value']);
             mysqli_stmt_execute($stmt);
             mysqli_stmt_close($stmt);
             echo mysqli_stmt_affected_rows($stmt);