it’s “outCallbackFunction”

and get rid of that strong tag

You are correct. If you don’t call ob_end_flush nothing will be displayed!

There are other ways than described in the example to use outputbuffering. A simpler way is to not use a callback function. Simply start the output buffer and then when you want to display the output run ob_end_flush().

If you want to catch the output in a variable use ob_get_contents() instead like this: $theOutput = ob_get_contents();
You can then echo $theOutput to display the output.

Catching the output in a variable can be a simple way to implement a cache system… Simply write the output to a file for later use. The first thing you do in your script is to controll if there is a cache file saved, then display that instead of going through the script.

We will try to make a tutorial about “simple cache system with output buffering” later if there is interest in that?

//Mattias

Any way this article give me some gud idea abt the usage of ob_start.But still i got another doubt that if we dont use ob_end_flush also the o/p will be displayed rit?then wats tis funcz use.