Re: [PHP-DEV] DL Extensions From: Rasmus Lerdorf (rasmus <email protected>)
Date: 04/23/99

> I did encounter a strange situation where doing a php3_printf()
> within my function doesn't seem to work if nothing has been sent
> from the script yet (but works just fine if something has been sent
> already). Not a big deal, since I won't actually be doing that in
> the long run, but odd nonetheless.

There aren't too many modules that actually output directly. Most just
return something, so you may not have hit this before. If you have a
module that does its own output, then before the first possible bit of
output you need to do something like this:

    if (!php3_header()) {
        return;
    }

php3_header() will return false on a HEAD request in which case your
module is not allowed to send anything.

-Rasmus 

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