如果文件未被称为“somename.php”，则重定向

I have a php file that is included in every other page, that's why I want to modify the code so it's not going to loop forever.

Basically I want to redirect from any other page if the user is not a member to a splash page, the error comes when we reach splash.php and it executes the same redirect again and again (infinite loop).

So I want to modify the code to execute only if the current page is NOT splash.php

Thanks

if (!isMember()) {
    header('Location: ' . MY_URL_ROOT . 'splash.php');
}

The following should suffice:

if (!isMember() && $_SERVER['PHP_SELF'] != MY_URL_ROOT . 'splash.php') {
    header('Location: ' . MY_URL_ROOT . 'splash.php');
    exit();
}

Incidentally, you should always call exit after you use a header to re-direct, unless you specifically want the server to continue processing the rest of the script.