Note:
For security, $_GET/$_POST are readonly in Yaf, which means
if you set a value to these global variables, you can not get it from
Yaf_Request_Http::getQuery() or
Yaf_Request_Http::getPost().
But there do is some usage need such feature, like unit testing. thus
Yaf can be built with --enable-yaf-debug, which will allow Yaf read the
value user set via script.
in such case, Yaf will throw a E_STRICT warning to remind you about
that: Strict Standards: you are running yaf in debug mode