PHP filter_input(INPUT_SERVER, 'REQUEST_METHOD') returns null?

Question

Why does this line return null in my live server?

filter_input(INPUT_SERVER, \'REQUEST_METHOD\');

The live server is p

Answer 1

I was having the same issue in my XAMPP localhost as well and was looking for solutions madly. What I ended up with, it is a known PHP bug for this function if you are running the PHP in FCGI mode (FCGI/PHP 5.4 in my case). I was confirmed going through this link.

The workaround I used is to filter_var($_SERVER['PHP_AUTH_USER'], FILTER_SANITIZE_STRING) but this is not an alternative of filter_input. filter_input is more secure.