Recently, the way we deal with REQUEST datas has changed (see http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/WebRequest.php?r1=29192&r2=30882).
We doesn't use any more $_REQUEST, instead we merge $_GET and $_POST with array_merge($_GET, $_POST) and $_POST overrides $_GET datas wich share same keys (see http://svn.wikimedia.org/viewvc/mediawiki/trunk/phase3/includes/WebRequest.php?annotate=30882#l53).
But the array_merge function has a side effect : pure numeric (not beginning with 0) keys of $_GET and $_POST are changed (see http://fr2.php.net/manual/en/function.array-merge.php)!
Despite the fact that numeric names are forbidden in HTML (see http://www.w3.org/TR/html4/types.html#type-cdata), people using them in extension (for example) will get confused. Moreover, it breaks some backward compatibility, for example with the quiz extension (see https://bugzilla.wikimedia.org/show_bug.cgi?id=13074 and test that : http://en.wikiversity.org/wiki/User:McCormack/quiz_test).
Solutions are :
- changing $this->data = array_merge($_GET, $_POST); simply with $this->data = $_GET + $_POST; wich should works as expected and does'nt seems to have any contraindication (once again, see http://fr2.php.net/manual/en/function.array-merge.php).
- checking both $_POST and $_GET for pure numeric keys and throwing an exception.
PS : I apologize for my poor english level.