Description:
------------
---
From manual page: https://php.net/session.upload-progress
---
manual:
https://www.php.net/manual/zh/session.upload-progress.php


where:
$key = ini_get("session.upload_progress.prefix") . ini_get("session.upload-progress.name");

is

$key = ini_get("session.upload_progress.prefix") . ini_get("session.upload_progress.name");


Test script:
---------------
<?php
$key = ini_get("session.upload_progress.prefix") . ini_get("session.upload_progress.name");
var_dump($_SESSION[$key]);

Expected result:
----------------
null

Actual result:
--------------
null