Strange error while trying to set a cookie

Fernando Rodríguez

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\websites\test\index.php:9) in c:\proyectos\websites\test\index.php
on line 11

My code is:

<?
$cookieValue = 'abra cadabra, pedo de cabra';
setcookie('aTestCookie', $cookieValue, time() + 3600);
?>

Any ideas? O:-)

Thanks

Jan 16 '06 #1

Subscribe Post Reply

1486

ZeldorBlat

Fernando Rodríguez wrote:

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\websites\test\index.php:9) in c:\proyectos\websites\test\index.php
on line 11

My code is:

<?
$cookieValue = 'abra cadabra, pedo de cabra';
setcookie('aTestCookie', $cookieValue, time() + 3600);
?>

Any ideas? O:-)

Thanks

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).

Jan 16 '06 #2

Pedro Graca

Fernando Rodríguez wrote:

Whenever I run a script page, I get this error:
Warning: Cannot modify header information - headers already sent by (output
started at c:\proyectos\websites\test\index.php:9) in c:\proyectos\websites\test\index.php ________________________________________________^_ _____________ ... on line 11 ________^^
My code is:
1 <?
2 $cookieValue = 'abra cadabra, pedo de cabra';
3 setcookie('aTestCookie', $cookieValue, time() + 3600);
4 ?>
Any ideas? O:-)

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_file

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

Jan 16 '06 #3

Alvaro G. Vicario

*** Pedro Graca escribió/wrote (16 Jan 2006 21:17:11 GMT):

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

(*) save auto_prepend_file

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
--

Jan 16 '06 #4

Fernando Rodríguez

Hello Pedro,

Please post the rest of your code

OK, here's the full code:

-----------------------------------
<html>
<head>
<title>Untitled Document</title>
<?
$cookieValue = 'abra cadabra, pedo de cabra';
setcookie('aTestCookie', $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.firstpage.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\websites\test\index.php:4) in c:\proyectos\websites\test\index.php
on line 6

Jan 17 '06 #5

Jerry Stuckle

Fernando Rodríguez wrote:

Hello Pedro,
Please post the rest of your code

OK, here's the full code:

-----------------------------------
<html>
<head>
<title>Untitled Document</title>
<? $cookieValue = 'abra cadabra, pedo de cabra';
setcookie('aTestCookie', $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.firstpage.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\websites\test\index.php:4) in
c:\proyectos\websites\test\index.php on line 6

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.
js*******@attglobal.net
==================

Jan 17 '06 #6

Pedro Graca

Fernando Rodríguez wrote:

OK, here's the full code:

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

This causes the follwoing output:

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

try

-----------------------------------
1 <?php
2 $cookieValue = 'abra cadabra, pedo de cabra';
3 setcookie('aTestCookie', $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_tags IIRC) to work.

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

Jan 17 '06 #7

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