"; if(empty($_GET["main"])) { echo "Welcome!"; }; if(!empty($_GET["main"]) and (preg_match("/^[a-zA-Z0-9_]*$/i",$_GET["main"]))) { $main = $_GET["main"]; foreach($title as $page) { if($page[0] == $main) { echo $page[1]; } } }; echo "

"; ?>