source: pro-bachkim-filespace/violetspace-prototype/getdata.php @ 4

<?php
/**
*array(
*       0 => array ('id' => 1, 'name' => 'Dir 1', 'parentID' => 0),
*       1 => array ('id' => 2, 'name' => 'Dir 2', 'parentID' => 0),
*       2 => array ('id' => 3, 'name' => 'Dir 1.1', 'parentID' => 1),
*       3 => array ('id' => 4, 'name' => 'Dir 1.1.1', 'parentID' => 3),
*       4 => array ('id' => 5, 'name' => 'Dir 1.1.1.1', 'parentID' => 4),
*)
**/


$aryDir = array(
                        0 => array ('id' => 1, 'name' => 'Dir 1', 'parentID' => 0),
                        1 => array ('id' => 2, 'name' => 'Dir 2', 'parentID' => 0),
                        2 => array ('id' => 3, 'name' => 'Dir 1.1', 'parentID' => 1),
                        3 => array ('id' => 4, 'name' => 'Dir 1.1.1', 'parentID' => 3),
                        4 => array ('id' => 5, 'name' => 'Dir 1.1.1.1', 'parentID' => 4),
                        5 => array ('id' => 6, 'name' => 'Dir 1.1.2', 'parentID' => 3),
                        6 => array ('id' => 7, 'name' => 'Dir 3', 'parentID' => 0),
                        7 => array ('id' => 8, 'name' => 'Dir 3.1', 'parentID' => 7)
                );

if (isset($_POST['action'])) {
        if ($_POST['action'] == 'create_dir') {
                $newID = 9;
                $aryNewDir = array('id' => $newID, 'name' => $_POST['name'], 'parentID' => $_POST['parentID']);
                echo json_encode($aryNewDir);
        }
}
else {
        echo json_encode($aryDir);
}