Here is a tut/script how to get ?page=something

First of, You need to use the $_GET[""] function. Between the " and " we do page because then it will be ?page. (hope you understand)

Here is an example:
<?php

if($_GET["page"] == "home" OR $_GET["page"] == ""){
echo "This page will show up when you do ?page=home or ?page= or just the url of your site.";
}
?>
Verry easy isn't it?

Now let's add another page:
<?php

if($_GET["page"] == "home" OR $_GET["page"] == ""){
echo "This page will show up when you do ?page=home or ?page= or just the url of your site.";
}
else if($_GET["page"] == "downloads"){
echo "For example downloads page. ?page=downloads is the url for this page.";
}
?>
Now an error page. Just add an else at the end of all pages:
<?php

if($_GET["page"] == "home" OR $_GET["page"] == ""){
echo "This page will show up when you do ?page=home or ?page= or just the url of your site.";
}
else if($_GET["page"] == "downloads"){
echo "For example downloads page. ?page=downloads is the url for this page.";
}
else{
echo "Page does not exist!";
}
?>

That was it!

Hope you understand and have fun!