Accueil/modules/todo/ajax/saveTodoist.php

<?php

$xmla = simplexml_load_file('../db/todoist.xml');

if (isset($_POST['token'])) {

    $token = trim($_POST['token']);
    $xmla->addChild("token", $token);
    $xmla->asXML('../db/todoist.xml');
    echo "ok";

} else if (isset($_POST['name']) && isset($_POST['id'])) {

    $name = trim($_POST['name']);
    $id = trim($_POST['id']);
    $xmla->addChild("name", $name);
    $xmla->addChild("id", $id);
    $xmla->asXML('../db/todoist.xml');

    echo "ok";

}