transfer - PHP Variable from one server to another -

i pretty new php.

i have 2 websites: site1 has code counts characters in domain name. have:

echo count($letters); 

this works great. need take variable , echo on site2. how can that? site2 on different server.

very easy , straight forward solution is

$content = file_get_contents('http://ww.google.com'); echo $content; 

and replace google link other server link