<?php
session_start();

include (__DIR__ . '/../include/class.pdo.php');

var_dump($_POST);

$pdo = PdoBD::getPdoBD();

var_dump($_SESSION);

$pdo->majActivite( 
    $_SESSION['cis'],
    $_SESSION['idUtilisateur'],
    $_POST['date'],
    $_POST['tranche'],
    $_POST['dispo']
);