PHP response header values – usual methods don’t work. What am i doing wrong? [duplicate]

I need to read a response header value via PHP called Geocode that contains a country code – see image for details.

print_r($_SERVER)
print_r($_ENV)
print_r(getallheaders()) 
print_r(apache_request_headers()) 

I could not find the value via these methods.

Any idea of what I am doing wrong?