Jabbs 0 Newbie Poster

Hi there! I'm new and a newbie when it comes to php - (I can hear the groans from here!)

My question revoles around enabling loading of php pages dynamically of the:

mysite.com/index?page=contact

type.

I have seen posts on here where you can dynamically load the title tags (and so on) dependent on the page loaded (like the pretend link above) such as:

functions.php

<?php
    function checkPage($arg) {
      switch ($arg) {
        case "home":
          $title = "My home page";
          break;
        case "downloads":
          $title = "My downloads";
        case "contact":
          $title = "Contact me";		  
          break;
      }
 return $title;

}

with:

<?php  include("functions.php");
     $title = checkPage($_GET['page']);
?>
<doctype etc>
<head>
    <title><?php echo $title;?></title>
</head>

Which results in the page having a title of "Contact me".

So, all good so far I guess.

I would like to take this a step further and load page content dependent on the ?page= part.

Therefore if the page loaded (either directly or by clicking a link in the html) was mysite.com/index.php?page=members then index would, as well as loading the header and footer dynamic title etc would also load content from members.php (for instance).

Is this a sensible approach and how could it be done?

Point to remember:
There will be a LOT of pages on the site but each would have the same (or similar) header/sidebar/footer. To that end I would do something like the below index.php but I am wondering about the above solution and how to implement it?

<html>
doctype etc

<head>
dynamic head content such as title/keywords and so on
static content such as css and js
</head>

<body>
<?php include "header.php"; ?>
<?php include "sidebar.php"; ?>

the content based on what page has been clicked (i.e. ?page=members)

<?php include "footer.php"; ?>
</body>
</html>

Hope you can help :-)