<div id="content"> <?php /*** * Content Template */ // Initialize variables if ( isset($_GET['p']) ) { $id = $_GET['p']; $file = "pages/p_$id.php"; // Check file if (file_exists($file)) { if (is_readable($file)) { include($file); } else { echo "<p>The page $id isn't readable!</p>"; } } else { echo "<p>The page $id doesn't exist!</p>"; } } else { $id = 0; include("pages/p_index.php"); } // Validate id value ?> </div>