How do I pass parameters in PHP?

Hi there, I'm a newbie with php and not much of a programmer, I let Dreamweaver do most of the work. I am trying to pass parameters through the URL to load a page within a page for example
aboutus.php?pageid=1 sort of thing.
I have defined the recordset and want to load the content of the page with the corresponding id.
How do I do it?
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OK something like;

if(isset($_REQUEST['pageid']) {
  // code to get the content for that page i.e. do your query with something like SELECT * from table WHERE id = $_REQUEST['pageid']
} else {
  // get some default content i.e. no pageid was passed...

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cokefourAuthor Commented:
the '{' is throwing errors after [pageid]
if(isset($_REQUEST['pageid']) {

should be

if(isset($_REQUEST['pageid'])) {  

was missing a bracket )
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try this also
$pageid= $_GET['pageid']; // or $_POST['pageid']; if u used a form to post variable
switch ($pageid) {
    case 1:
        echo "page = 1";
    case 2:
        echo "page = 2";
       echo "not a known page";
doh :) typing too quickly as usual :|
cokefourAuthor Commented:
thanks guys
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