How do you re-direct if it's not the first thing you want to do on a page.

heigold1

I want to re-direct eventually, but later on down in some php code.

However, when i try to use, say:

header("Location: http://wco.helloworld.com/intranet/addTrackingInfo.php");

I keep getting the message:

Warning: Cannot modify header information - headers already sent by

Does anyone know how to re-direct if it's later on down in the code?

Your response would be greatly appreciated,

Brent.
:mad: 😕 😕

leatherback

Hi,

Just make sure you do not output anything to the browser. you can do this by saving output to a variable, and only echo the variable once you have made the last checks.

ahundiak

Or use the ob_ functions.

Weedpacket

Or rearrange your code so that you don't need to produce any output before redirecting: after all, what good will the time and effort spent generating it do anyone if you're just going to redirect anyway? (I'm not sure if it happens or not, but if you generate the output with ob_* functions it may embed that output in the redirect response - so if you're redirecting the user because you don't want them to see the rest of the page then you would have just sent them what you don't want them to see.)

ahundiak

Let's say your script is happily executing along, querying and processing data and generating html. The a problem occurs. Missing data, unexpected query results, whatever. With the ob_ (output buffering/control) routines you can actually clear the html that has been written and then generate (or redirect to) a brand new page for recovery.

This is not necessarily the best way to program. I generally collect up all the data then output via a template. But it is a common approach and simple to implement.