Browser variable not working on include?

Okay so I have a code which says

if (!$num_users || $num_users !== 1 ) {
include_once('../assets/scripts/error.php?error=404');
exit();
}

and it doesn't seem to work, I get the error

failed to open stream: No such file or directory

but if I change the include line to

include_once('../assets/scripts/error.php');

it works. I need to have the开发者_StackOverflow ?error=404 on the end to tell the page to echo out that type of error message. Any help would be grateful!

if (!$num_users || $num_users !== 1 ) {
    $error_type = 404;
    include_once('../assets/scripts/error.php');
    exit();
}

And then in error.php, use the variable $error_type if it is defined

That's really not how things work. ?error=404 is a parameter that would be passed through an HTTP server while parsing the PHP code. include literally just takes the contents of the named file and inserts them into the current file right here. You can set a variable $error before the include, and then you can get access to it in the included file.