Problem with header("Location:.. function

[bissatch@yahoo.co.uk]

Hi,

I am trying to use the following function:

header("Locatio n: http://www.mysite.co.u k/home/update/index.php");

....but getting the following error:

Warning: Cannot modify header information - headers already sent by
(output started at
/data/httpd/VirtualHosts/www/htdocs/home/update/index.php:12) in
/data/httpd/VirtualHosts/www/htdocs/home/update/index.php on line 124


Is there any reason why I am getting this error? One concern of mine
was that the header function was not at the top of the page (line 1),
does this matter? I need this command to run a series of statements and
depending on specific conditions, redirect the user to another page.

Cheers

Burnsy

[Alvaro G Vicario]

Re: Problem with header("Lo cation:.. function

*** bissatch@yahoo. co.uk wrote/escribió (7 Jul 2005 03:15:21 -0700):[color=blue]
> Warning: Cannot modify header information - headers already sent by
> (output started at
> /data/httpd/VirtualHosts/www/htdocs/home/update/index.php:12) in
> /data/httpd/VirtualHosts/www/htdocs/home/update/index.php on line 124
>
>
> Is there any reason why I am getting this error?[/color]

Nope. You've been chosen randomly for suffering divine wrath :)

May I ask what's in line #12 of
/data/httpd/VirtualHosts/www/htdocs/home/update/index.php file?
[color=blue]
> One concern of mine was that the header function was not at the top of the page
> (line 1), does this matter?[/color]

It can be last time of the script if you want to. The only rule you must
follow is that headers come first and content comes later. You cannot mix
them.



--
-- Álvaro G. Vicario - Burgos, Spain
-- http://bits.demogracia.com - Mi sitio sobre programación web
-- Don't e-mail me your questions, post them to the group
--

[kjordan@insurancejournal.com]

Re: Problem with header("Lo cation:.. function

in other words, you're probably printing something to the screen
before your header command. just put your header command way at the
top.

[Philip Olson]

Re: Problem with header("Lo cation:.. function

This is the most commonly asked question in PHP and people keep asking
it. Maybe it's time to add a FAQ to the PHP Manual, I thought there was
already one.

The line number in which you call this does not matter, it can be on
line 1 or on line a million and still work. What does matter is whether
or not output (like html, text...) is sent the browser first. You don't
want that. Your error indicates that output began at around line 12 so
fix that. Or if you're lazy and want to write improper code, enable
output buffering to take care of this. Enabling it allows you to send
headers() throughout your code without a problem.

[Michael Winter]

Re: Problem with header("Lo cation:.. function

On 07/07/2005 17:35, Philip Olson wrote:
[color=blue]
> [Call to header function not 'working'] is the most commonly asked
> question in PHP and people keep asking it. Maybe it's time to add a
> FAQ to the PHP Manual, I thought there was already one.[/color]

There is an FAQ in the manual, but this shouldn't need to be added -
it's clearly addressed in the description of the header function:

"Remember that header() must be called before any actual output is
sent, either by normal HTML tags, blank lines in a file, or from
PHP."

[snip]

Mike

--
Michael Winter
Prefix subject with [News] before replying by e-mail.

[Marcin Dobrucki]

Re: Problem with header("Lo cation:.. function

Philip Olson wrote:
[color=blue]
> The line number in which you call this does not matter, it can be on
> line 1 or on line a million and still work. What does matter is whether
> or not output (like html, text...) is sent the browser first. You don't
> want that. Your error indicates that output began at around line 12 so
> fix that. Or if you're lazy and want to write improper code, enable
> output buffering to take care of this. Enabling it allows you to send
> headers() throughout your code without a problem.[/color]

Alternative solution is to use HTML_Page (HTML_Page2) or similar
mechanism, where you construct an objet to represent a page, and then
print your "body" stuff to it. That way, if you need to redirect mid
way through the script, you are quite sure nothing has been sent. At
the end of the script, just call the "display" function for your object.

/m

[Philip Olson]

Re: Problem with header("Lo cation:.. function

Yes but it's asked all the time and newbies don't understand what that
means. Anyway, I'll add this FAQ this week.