(PECL mongo >=0.9.0)
MongoCursor::current — Returns the current element
This returns NULL
until MongoCursor::next() is called.
锟剿猴拷锟斤拷没锟叫诧拷锟斤拷锟斤拷
The current result document as an associative array. NULL
will be returned
if there is no result.