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Posted by Kim Andr Aker on 09/20/06 14:43
ii2o wrote:
> Kim André Akerø wrote:
> > ii2o wrote:
> >
> > > Hi all,
> > >
> > > I'm trying to develop a website that selects from 3 stylesheets
> > > depending on which style they have chosen. Their preference is
> > > stored in a cookie and this is where the problems begin. I have
> > > boiled my code down to the bare essentials in the hope that
> > > someone can help me with this problem. I would be grateful if you
> > > could explain what I have done is wrong too, because I read that
> > > cookie settings should be done before the <html> tag, which is
> > > what I have done.
> > >
> > > === CODE (this can be copied and pasted into a php file) ===
> > >
> > > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
> > > "http://www.w3.org/TR/html4/loose.dtd">
> > > <?php
> > > $cstyle = (int)$_COOKIE["cstyle"];
> > > print("***$cstyle***");
> > >
> > > if ($cstyle < 1 || $cstyle > 3)
> > > {
> > > $cstyle = 1;
> > > }
> > >
> > > @extract($_POST);
> > > $cstylenew = (int)$_GET['cstyle'];
> > >
> > > if ($cstylenew >= 1 && $cstylenew <= 3)
> > > {
> > > setcookie("cstyle3", "$cstylenew", time()+5000000);
> > > }
> > > ?>
> > >
> > > <html>
> > >
> > > <head>
> > > <link href="style<?php print($cstyle);?>.css" rel="stylesheet"
> > > type="text/css">
> > > </head>
> > >
> > > <body>
> > > <br>
> > > <a href="<?php print("$PHP_SELF"); ?>?cstyle=1">style
> > > 1</a><br> <a href="<?php print("$PHP_SELF");
> > > ?>?cstyle=2">style 2</a><br> <a href="<?php
> > > print("$PHP_SELF"); ?>?cstyle=3">style 3</a><br> </body>
> > > </html>
> > >
> > > Best regards,
> > > ii2o
> >
> > Cookies are set in the headers, meaning that setcookie() must be
> > called before any output is sent to the user (even before your
> > DOCTYPE statement). Make sure that you don't have any blank spaces
> > before <?php as well.
>
> Hi there,
>
> Thanks for the response. Unfortunately even when I move the doctype
> statement to below the php code, I still get the following error
> "Warning: Cannot modify header information - headers already sent by
> (output started at d:\testserver\testcookies.php:3) in
> d:\testserver\testcookies.php on line 14".
>
> When you mean before any output is sent to the user, do you mean that
> I can't use the $_GET statement? If so, how is possible to select a
> stylesheet in the code without accessing this variable?
>
> I'm very confused!
print() is considered sending output, too.
--
Kim André Akerø
- kimandre@NOSPAMbetadome.com
(remove NOSPAM to contact me directly)
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