Как после exit() вывести остальные блоки страницы

    include('class/classDatabase.php');
    include('class/classFunctions.php');
    include('includes/top.php'); 
    include('includes/middle-left.php'); 
    include('includes/middle-top.php');

    if (!isset($_POST["fullname"])) 
    {   print "You did not fill in all fields. All fields are required. Go <a href='javascript:history.back(1)'>back</a> and fill in all fields.\n";
    include('includes/middle-bottom.php'); 
        exit();
    } Else {
 
    if(strlen($fullname)>'50') {
            print "<font color=#cc0000><b>$strLabelError</b></font><br>The fullname has to be shorter than <b>50</b> characters. Go <a href='javascript:history.back(1)'>back</a> and choose a shorter full name.\n";
            exit();
        }
        
    if(strlen($shortname)>'15') {
            print "<font color=#cc0000><b>$strLabelError</b></font><br>The shortname has to be shorter than <b>15</b> characters. Go <a href='javascript:history.back(1)'>back</a> and choose a shorter short name.\n";
            exit();
        }
 
и т.д.

</div>
</td></tr>
</table>
 
<?php 
    include('includes/middle-bottom.php'); 
?>
 
</html>

try {
    ...
   if(....)
      throw new Exception();
}
catch (Exception $e) {
    echo $e->getMessage();
}
.....

    
If (!$fullname OR !$shortname OR !$birthday OR !$password) { 
    print "<font color=#cc0000><b>$strLabelError</b></font><br>You 123456 did not fill in all fields. Go <a href='javascript:history.back(1)'>back</a> and fill all the fields.\n"; 
echo "</div>";
echo "</td></tr>";
echo "</table>";
include('includes/middle-bottom.php');
            exit();             
        }