http_response_code() always returns 200, even on 404

Question

I'm trying to use Apache's ErrorDocument to handle client and server errors by passing them to error.php.

.htaccess

ErrorDocument 400 /error.php
...
ErrorDocument 404 /error.php
...
ErrorDocument 511 /error.php

error.php

var_dump(http_response_code());

So, I point my browser to mywebsite.com/noeutdhoaeu, which does not exist. The response from the server is 404 Not Found, as you would expect. But PHP gives me 200.

What gives?

Edit: I have this same exact code on my Apache-based localhost and it works just fine. That is the reason I am asking this question. PHP is completely aware that a 404 error has occurred in my local environment. On my hosted environment, however, PHP has no idea.

Answer 1

As @Boaz said, PHP doesn't know what Apache is going to set later.

You could use this approach to use the error code in PHP:

ErrorDocument 400 /error.php?error=400
ErrorDocument 401 /error.php?error=401
...

And in PHP test $_GET["error"].