If you retrieve a file, how do you ensure that file does not contain malicious data?

如果检索某个文件，如何确保该文件不包含恶意数据？

youdao

When you try to retrieve a file, the process is slower than if it was stored in one block .

当你设法取回档案的过程是慢如果是存放在一块。

youdao

These functions were included in PHP from the inception, but administrators haven't always activated them. The following functions can retrieve a file from the web.

这些函数一开始就包含于php中，但管理员有时可能不会激活它们。

youdao