Get lead_detail_long values in a loop

<?php
// change the 6 here to your form ID
add_filter('gform_confirmation_6', 'display_long_lead', 10, 4);
function display_long_lead($confirmation, $form, $lead, $ajax){
    $lead = RGFormsModel::get_leads($form['id']);
    // print_r($lead);
    foreach($lead as $k=>$lead) {
        // get complete lead information for each lead
        $complete_lead = RGFormsModel::get_lead($lead['id']);
        // print_r($complete_lead);
    }
    // we didn't actually do anything with the confirmation
    return $confirmation;
}