Assume I start session and print data stored in session and print some html stuff at the begining of php file. Then I need to use header() to download a file afterwards.
When I do it i get this error:
Warning: Cannot modify header information - headers already sent by (output started at /var/www.....
I know I have to use ob_start() and flush but cannot apply it. I don't want to cache everything from begining untill end in my page because it is too long.
Would you please anyone show me an example?
thanks in advance