<?php require_once '../../lib/Laposta.php'; Laposta::setApiKey("JdMtbsMq2jqJdQZD9AHC"); // initialize list with list_id $list = new Laposta_List(); try { // update list, insert info as argument // $result will contain een array with the response from the server $result = $list->update('FKjs6srKdf', array('name' => 'Klanten')); print '<pre>'; print_r($result); print '</pre>'; } catch (Exception $e) { // you can use the information in $e to react to the exception print '<pre>'; print_r($e); print '</pre>'; }