Pragma: no cache

I ran into the following:
print "Content-type: text/html/\nPragma: no-cache\n\n";

I know what the Content-type/html means, but my perl book doesn't explain the Pragma:no-cache.  Can anyone help with this?
donb1Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

icdCommented:
When a document is requested from your browser it first requests the document header, which contains the date that the document was last modified. This date can be compared against any locally cached version (if any) and the document contents only retrieved if there is no local copy or the local copy is older than the one on the server. The Pragma: no-cache ensures that no local copy is made and the server is requested for the contents every time.

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Perl

From novice to tech pro — start learning today.