我不希望php move_uploaded_file覆盖现有文件

Question

我有一个允许用户提交文件的html页面.
以下是我保存提交文件的Web服务.但我不想让move_uploaded_files覆盖现有文件？我该怎么办？谢谢

$tmpname = $_FILES["image"]["tmp_name"];
$movedname = "submit-img/" . $_POST["category"] . "/" . $_FILES["image"]["name"];
$prevPage = parse_url($_SERVER['HTTP_REFERER']);

move_uploaded_file($tmpname, $movedname);

Answer 1

三思而后行:

if (!is_file($movedname)) {
    move_uploaded_file($tmpname, $movedname);
}