PHP header 404 not working

Question

Why is this not working, as in the pre-set 404 page is not loaded:

header(\"HTTP/1.0 404 Not Found\");
exit;

.htaccess has the

Answer 1

I noticed that it does not work so I created a class with a static method to solve the problem

I have a directory /error-pages where I store all error file

I have a class file error.php which can be included at the top of every page

class ServerError{
    public static function show($page){
        require $_SERVER['DOCUMENT_ROOT'].'/error-pages/'.$page.'.php';
        exit();
    }
}

So on your home.php page for example you say

if (my404IsTrue) {
    ServerError::show("404");
}

this way. you can use it for any other kind of error be it 403 or a custom error

Hope it Helps