How do I create the url links like the ones on Invision, which when you hover over the links they all have the index.php? and then some code to represent the page

ie

http://forums.invisionpower.com/index.php?automodule=blog - blog
http://forums.invisionpower.com/index.php?...&module=gallery - gallery
http://forums.invisionpower.com/index.php?act=Help

I can do it like this, but I would like to know how it is done there way.

if(isset($_POST['Login']) == 0) {
echo "<a href='newaccount.php?action=REG&CODE=00'>";
echo "Create an account";
echo "</a>";
}

Thanks in advanced

Using $_GET

$_GET is for variables passed in the URL, $_POST is for variables from a form post