Undefined Index with Switch statements

[kilbey1]

When I started PHP a year ago, I was always able to simply do my HTML, then do a switch statement and have certain things occur based on that. Example:

function defaultbody() {
     HTML HERE
}

switch ($i) {
     case "edit":
         echo "Edit here";
     break;
     default:
          defaultbody();
}

Now, I get undefined index all over town. Yes, I realize I can usually use isset in an if statement to fix this; yes, I realize I can usually use $_POST['i'] or $HTTP_POST_VARS['i'].

But I haven't been able to figure this out in a switch statement!

[kilbey1]

In fact, here's the code in question (truncated for readability). It works as written, but the default state always gives me 'undefined index' (notice I am using $HTTP_GET_VARS).

function defaultbody() {
?>

								<tr bgcolor="#eeeeee">
                                  <td><?php echo $row['Title']; ?></td>
                                  <td><a href="oppr.php?goto=details">Details</a></td>
                                  <td><a href="#aa">Apply</a></td>
                                </tr>


<?
}

switch ($HTTP_GET_VARS['goto']) {
   case "details":
?>

DETAILS HERE

<?
       	break;
   default:
		defaultbody();
}
//end SWITCH statement

[kilbey1]

I ended up shutting this error off at runtime by using error_reporting(E_ALL ^ E_NOTICE), but I suspect this isn't good coding...