title: http_build_query with utf-8 encoding
body: <p>I want to make a post request using file_get_contents. My post data contains Japanese characters. It seems like <code>http_build_query</code> is not supporting <code>utf-8</code>. I tried to use <code>http_build_query_utf8</code>, but it says no method to call. How can I do it?</p>