How do u do blah.php?name=

any tutorials explaining it? is it used to link pages?

It’s easy

Um I know how to do it in flash and php

All you would do is have an address like say…
www.site.com/section/page.php?id=5
then you would retrieve the variable 5 by going like this:

$id = $_GET['id'];

then $id would be equal to 5. This is used often with databases where the id is the number of the row and all that information is displayed.
[edit]I just realized the link to the other page, so yeah, you have two examples now[/edit]