Writing headers after response has already been sent problem

Hii readers! , a hearty good morning/afternoon/evening!! in this small article, i will first introduce you with the problem which many people face and don't seem to find a solution in a straight forward manner, then i will tell you a very easy solution to the problem.

Introdcution to the problem : This problem relates to server side programming (the problem is technology independent, like php,asp,jsp). It is quite common observation that, the server side page in which you are programming will contain the client side HTML/DHTML/XHTML code. So this is what exactly the part of the data that would be sent by the server as response. the normal behavior of a server is to start sending data (emptying the output buffer ) or start output streaming as soon as the output buffer starts getting filled. If suppose, the output streaming has been started(which the server will automatically do, if it has got anything in it's o/p buffer) and then you want to cancel the o/p, means you want the client not able to see the content of current page, hence you w'd want to redirect the user to another page/location. And this is where we will get a big fat error. telling that "can not modify headers already sent". (in php) It is quite logical, because headers had already been sent at the time output streaming started, and then if you ask the server to redirect the user (a redirect needs a particular header) , then how it will be possible?? So this was the problem

Solution to the problem : The solution is straight forward, what we have to do is , tell the server to not to start output streaming automatically, i w'd have requested my server in these words if however it was a human!! " my inti server, please be a more patient and keep all the output data with you untill i tell you when to send it". Now to achieve this , different technologies(php.ASP,JSP etc.) have their own ways. I will tell you the php way
to tell the server to just buffer the output data and not to send it , use ob_start();
to send the output data, use ob_flush_clean();
and to redirect to another location/page, use ob_end_clean() and then your redirect code like
header('Location:anotherpage.php');

Hope this saves your time, if you have any queries then you can buzz me at my mailbox too ....