There is no txt after the new text, and there is no change after renaming.

Question

I don’t know what’s wrong

Answer 1

I've done it, but when I enter the server address in the next step, it says it can't be found and the page is lost. I don't know how to solve it.

Answer 2

So how should I modify it?

Answer 3

The file suffix is ​​hidden by you. The file abc.php you created is actually abc.php.txt