ob_implicit_flush() will turn
implicit flushing on or off (if no
flag is given, it defaults to on). Implicit flushing
will result in a flush operation after every output call, so
that explicit calls to flush() will no longer be
needed.
Turning implicit flushing on will disable output
buffering, the output buffers current output will be sent as
if
ob_end_flush() had been called.
See also flush(),
ob_start(), and
ob_end_flush().