foreach ($members_ids as $member_id) {
$post[Adherent::PK] = (int)$member_id;
$contrib = new Contribution($this->zdb, $this->login);
foreach ($members_ids as $member_id) {
$post[Adherent::PK] = (int)$member_id;
$contrib = new Contribution($this->zdb, $this->login);