<?PHP
require "config.PHP";

$page = $_GET['page'];
if( isset( $page ) ) { 
    if( file_exists( MVCROOT . "/$page.PHP" ) ) {
        include "$page.PHP";
    } else {
        header("HTTP/1.0 404 Not Found");
    }
}


?>

MVC框架中的标准做法是使用 output buffering(ob_start(),ob_get_contents()和ob_end_clean())来控制发送给用户的方式,时间和内容.

这样,只要您捕获框架的输出,就不会在您需要之前将其发送给用户.

要加载404,您将使用(例如)：

<?PHP
require "config.PHP";

$page = $_GET['page'];
ob_start();

if (isset($page)) {
    echo "isset is true";
    if (file_exists(MVCROOT."/$page.PHP")) {
        include MVCROOT."/$page.PHP";
        $output = ob_get_contents();
        ob_end_clean();
        echo $output;
    } else {
        ob_end_clean(); //we don't care what was there
        header("HTTP/1.0 404 Not Found");
        include MVCROOT."/error_404.PHP"; // or echo a message,etc,etc
    }
}
?>

希望有所帮助.