Allora io ho fatto una cosa del genere

Codice PHP:
<link rel='stylesheet' href='stile.css' type='text/css'>
<? include("header.php");    ?>
<center>
<table border="0" width="760" id="table1">
    <tr>
        <td>
        <table border="0" width="100%" id="table2">
            <tr>
                <td valign="middle">
                <p align="center"><? include("centrata.php");?></td>
            </tr>
        </table>
        </td>
    </tr>
</table>
</center>
<? include("footer.php");?>
all'interno di centrata.php ci sta una serie di tabelle e all'interno di una di questa ho inserito <? include("main.php");?> che poi è questo....




Codice PHP:
<?php

$FileDir = "pagine"; // Dove si trovano le pagine
$Wrong_ID = "Questa pagina non esiste! 

"; // Messaggio in caso la pagina non esista
$Start_page = "home.html"; // La pagina che viene aperta all'inizio


         if(!is_dir($FileDir))die("Errore directory non valida!!");


             if(isset($_GET['id']))
              
              {

                      $id = trim($_GET['id']);
                      $id = str_replace("\\", "/", $id);
                      
                      
                      
                                            if(file_exists($FileDir."/".$id.".html"))
                                            
                                            {
                                            
                                            $id = $id.".html";
                                            
                                            }  
                                            
                                            elseif(file_exists($FileDir."/".$id.".htm"))
                                            
                                            {
                                            
                                            $id = $id.".htm";
                                            
                                            }
                                            
                                            elseif(file_exists($FileDir."/".$id.".inc"))
                                            
                                            {
                                            
                                            $id = $id.".inc";
                                            
                                            }
                                            
                                            elseif(file_exists($FileDir."/".$id.".php"))
                                            
                                            {
                                            
                                            $id = $id.".php";
                                            
                                            }
                                            
                                            else
                                            
                                            {
                                            
                                            echo $Wrong_ID;
                                            
                                            $id = $Start_page;
                                            
                                            }
                      
        

              }
              
              else
              
              {
                      
                      $id = $Start_page;
              
              }

            
            
      
      
      
      
      if($id != $Start_page)
      
      {
                   include($FileDir."/".$id);
                   
                   }
                   
                   else
                   
                   {
                   
                      if(file_exists($FileDir."/".$id))
                      
                      {
                      
                          include($FileDir."/".$id);
                      
                      }
                      
                      else
                      
                      {
                      
                          echo "[*][b]$Start_page non è stato trovato! 

[/b]";
                      
                      }
                   
                   }
      
      
      
      

?>
e per aprire i collegamenti basta che l'indirizzo a ?id=nome della pagina senza l'estensione visto che fa il controllo di tutte le estensioni

olevo sapere se c'era qualcosa che non andava o se potevo fare qualcosa per migliorare