Image processing in functions.

I have script (main.php) that calls a secondary script (image.php)
that produces a graphic. The invocation in main.php is like this...

print "<img src=" . chr(34) . "image.php?option=$draw" . chr(34) . ">"

What I would like to do is incoporate all the code contained in
image.php into my main.php as a function. As it currently stands if I
do this, I get an error message saying that the headers already sent.
I've not quite got my head around this- any help would be gratefully
received.

"Roger" <fspooner@ripnet.jj.ik> wrote in message
news:hm3fc0drovsbqcp27jra5jidc1jgrt6948@4ax.com...
> I have script (main.php) that calls a secondary script (image.php)
> that produces a graphic. The invocation in main.php is like this...
>
> print "<img src=" . chr(34) . "image.php?option=$draw" . chr(34) . ">"
>
> What I would like to do is incoporate all the code contained in
> image.php into my main.php as a function. As it currently stands if I
> do this, I get an error message saying that the headers already sent.
> I've not quite got my head around this- any help would be gratefully
> received.

Something in image.php is sending headers (most likely it'll be the
content-type for jpg or png or whatever) and so is main.php - without seeing
the output I can't determine what. If you tweak image.php so it produces a
file on the server but only returns the URL to it, you can link it out and
get all the page output produced by the main.php.

Garp

*** Roger wrote/escribió (Wed, 09 Jun 2004 23:52:46 +0100):
> print "<img src=" . chr(34) . "image.php?option=$draw" . chr(34) . ">"

> What I would like to do is incoporate all the code contained in
> image.php into my main.php as a function.

You mean that you want a script that can either output HTML or graphics,
don't you? It should be rather straightforward:

function graphic(){
// Print graphic
}

if($_GET['option']=='WHATEVER'){
graphic();
exit;
}else{
// Print HTML
}

> As it currently stands if I do this, I get an error message saying that
> the headers already sent. I've not quite got my head around this- any
> help would be gratefully received.

You are probably mixing graphics and HTML in one single document.

--
--
-- Álvaro G. Vicario - Burgos, Spain
--