function sys_threadsort($fields, $level, &$result, $arr, $arr2)
{
foreach ($fields as $field) {
$field["tlevel"] = $level;
if (!isset($result[$field["id"]])) {
$result[$field["id"]] = $field;
}
if (isset($arr2[$field["id"]]) and count($arr2[$field["id"]]) > 0) {
sys_threadsort($arr2[$field["id"]], $level + 1, $result, $arr, $arr2);
}
}
}
static function threadsort($arr)
{
$arr2 = array();
foreach ($arr as $key => $value) {
$arr[$key]["sorting"] = $key;
}
uasort($arr, "sys_threadsort_cmp");
foreach ($arr as $value) {
$arr2[$value["pid"]][] = $value;
}
$result = array();
sys_threadsort($arr, 0, $result, $arr, $arr2);
$last_sort = 0;
$elems = count($result);
foreach ($result as $key => $resultitem) {
if ($resultitem["tlevel"] == 0) {
$last_sort = $resultitem["sorting"] * $elems;
} else {
$last_sort++;
}
$result[$key]["sorting"] = $last_sort;
}
uasort($result, "sys_threadsort_cmp2");
return array_values($result);
}