Insert code frontpage header.php

I would like to insert this code in a homepage
<? php
if (function_exists (‘Bcn_brand \ bcn_brand_get_html’)):
print Bcn_brand \ bcn_brand_get_html (‘ca’);
endif;
?>.

in the header.php so that it looks like a bar but when I insert it into the file, it can not be seen.
Do you know what I could do?

Solved !!! I put the code directly to /newspaper/header.php and that’s why it was not published.

This code is a plugin of a public institution.

Thank you very much for your help!