* basically allow a php script to return a response and continue with
* code execution, good for statistics.
* before echo anything to user call begin and after call end, than you can continue doing stuff
* this is the point where we need to give a sign to this class
* that we wanna write our response.
* @return void
* after this function execution the response will be sent to the
* client, and code continue without client need to wait.
$size = ob_get_length();
ob_end_flush();// Strange behaviour, will not work
flush();// Unless both are called !}}