Strange error while trying to set a cookie

**ZeldorBlat** · Jan 16 '06, 08:25 PM

Re: Strange error while trying to set a cookie

Fernando Rodríguez wrote:[color=blue]
> Hi,
>
> Whenever I run a script page, I get this error:
> Warning: Cannot modify header information - headers already sent by (output
> started at c:\proyectos\we bsites\test\ind ex.php:9) in c:\proyectos\we bsites\test\ind ex.php
> on line 11
>
> My code is:
>
> <?
> $cookieValue = 'abra cadabra, pedo de cabra';
> setcookie('aTes tCookie', $cookieValue, time() + 3600);
> ?>
>
> Any ideas? O:-)
>
> Thanks[/color]

You get that error message because the headers have already been sent
and output has started. Specifically, you sent output on line 9 of
index.php. If you want to set HTTP headers (and setting a cookie
requires sending a header) you need to do it *before* you send any
other output to the browser -- even a single whitespace counts.

So, you have two options here:

1. Re-order the script so that you call setcookie() before you send any
output.
2. Use ob_start() and ob_flush() to buffer the output (see
<http://www.php.net/manual/en/ref.outcontrol. php> for more information).

**Pedro Graca** · Jan 16 '06, 09:25 PM

Re: Strange error while trying to set a cookie

Fernando Rodríguez wrote:[color=blue]
> Whenever I run a script page, I get this error:
> Warning: Cannot modify header information - headers already sent by (output
> started at c:\proyectos\we bsites\test\ind ex.php:9) in c:\proyectos\we bsites\test\ind ex.php[/color]
_______________ _______________ _______________ ___^___________ ___ ...[color=blue]
> on line 11[/color]
________^^[color=blue]
>
> My code is:[/color]

1 <?
2 $cookieValue = 'abra cadabra, pedo de cabra';
3 setcookie('aTes tCookie', $cookieValue, time() + 3600);
4 ?>
[color=blue]
> Any ideas? O:-)[/color]

Please post the rest of your code

I guess line 3 in the example you posted is actually line 11 in your
*real* script, making line 1 in the example your *real* line 9.

The script you posted had absolutely no reason (*) to issue that
warning.

(*) save auto_prepend_fi le

--
If you're posting through Google read <http://cfaj.freeshell. org/google>

**Alvaro G. Vicario** · Jan 16 '06, 09:45 PM

Re: Strange error while trying to set a cookie

*** Pedro Graca escribió/wrote (16 Jan 2006 21:17:11 GMT):[color=blue]
> The script you posted had absolutely no reason (*) to issue that
> warning.
>
> (*) save auto_prepend_fi le[/color]

Or blank spaces before the first delimiter.

--
-+ Álvaro G. Vicario - Burgos, Spain
++ http://bits.demogracia.com es mi sitio para programadores web
+- http://www.demogracia.com es mi web de humor libre de cloro
--

**Fernando Rodríguez** · Jan 17 '06, 04:45 PM

Re: Strange error while trying to set a cookie

Hello Pedro,
[color=blue]
> Please post the rest of your code[/color]

OK, here's the full code:

-----------------------------------
<html>
<head>
<title>Untitl ed Document</title>
<?
$cookieValue = 'abra cadabra, pedo de cabra';
setcookie('aTes tCookie', $cookieValue, time() + 3600);
?>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>

<body>

<ol>
<li> <a href="http://es2.php.net/FAQ.php">PHP FAQ</a></li>
<li> <a href="http://es.php.net/manual/en/tutorial.firstp age.php">PHP Tutorial</a></li>
<li> <a href="http://es.php.net/manual/en/index.php">PHP Manual</a></li>
</ol>

<form action="action. php" method="post">
<p>Your name: <input type="text" name="name" /></p>
<p>Your age: <input type="text" name="age" /></p>
<p><input type="submit" /></p>
</form>

</body>
</html>
------------------------------------

This causes the follwoing output:

Warning: Cannot modify header information - headers already sent by (output
started at c:\proyectos\we bsites\test\ind ex.php:4) in c:\proyectos\we bsites\test\ind ex.php
on line 6

**Jerry Stuckle** · Jan 17 '06, 06:05 PM

Re: Strange error while trying to set a cookie

Fernando Rodríguez wrote:[color=blue]
> Hello Pedro,
>[color=green]
>> Please post the rest of your code[/color]
>
>
>
> OK, here's the full code:
>
> -----------------------------------
> <html>
> <head>
> <title>Untitl ed Document</title>
> <? $cookieValue = 'abra cadabra, pedo de cabra';
> setcookie('aTes tCookie', $cookieValue, time() + 3600); ?>
> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
> </head>
>
> <body>
>
>
>
> <ol>
> <li> <a href="http://es2.php.net/FAQ.php">PHP FAQ</a></li>
> <li> <a
> href="http://es.php.net/manual/en/tutorial.firstp age.php">PHP
> Tutorial</a></li>
> <li> <a href="http://es.php.net/manual/en/index.php">PHP
> Manual</a></li>
> </ol>
>
>
> <form action="action. php" method="post">
> <p>Your name: <input type="text" name="name" /></p>
> <p>Your age: <input type="text" name="age" /></p>
> <p><input type="submit" /></p>
> </form>
>
> </body>
> </html>
> ------------------------------------
>
> This causes the follwoing output:
>
> Warning: Cannot modify header information - headers already sent by
> (output started at c:\proyectos\we bsites\test\ind ex.php:4) in
> c:\proyectos\we bsites\test\ind ex.php on line 6
>
>[/color]

And it's correct. The headers are output as soon as ANY text is sent to
the browser - in this case the headers were sent at the first line of
your page:

<html>

Put the setcookie code immediately at the top of your file, and ensure
there is no white space (or anything else) before it.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

**Pedro Graca** · Jan 17 '06, 07:25 PM

Re: Strange error while trying to set a cookie

Fernando Rodríguez wrote:[color=blue]
> OK, here's the full code:
>
> -----------------------------------
> <html>
> <head>
> <title>Untitl ed Document</title>
> <?
> $cookieValue = 'abra cadabra, pedo de cabra';
> setcookie('aTes tCookie', $cookieValue, time() + 3600);
> ?>
> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">[/color]
<snip>[color=blue]
> ------------------------------------
>
> This causes the follwoing output:
>
> Warning: Cannot modify header information - headers already sent by (output
> started at c:\proyectos\we bsites\test\ind ex.php:4) in c:\proyectos\we bsites\test\ind ex.php
> on line 6[/color]

try

-----------------------------------
1 <?php
2 $cookieValue = 'abra cadabra, pedo de cabra';
3 setcookie('aTes tCookie', $cookieValue, time() + 3600);
4 ?>
5 <html>
....

I started the code with "<?php" because, instead of "<?", it will work
on all servers irrespective of their configuration. Your PHP start tag
needs a specific configuration (short_open_tag s IIRC) to work.

--
If you're posting through Google read <http://cfaj.freeshell. org/google>

Strange error while trying to set a cookie

Strange error while trying to set a cookie

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