Header("Location: PROBLEM");

hi to all, i have a problem with code.

this

$result = $db->sql_query("UPDATE ".$prefix."_gax_wbox SET......'");
Header("Location: ".$adminfile.".php?adminload=$modulename&plugin=Proyectos");
}

it works well

this

if($choice == "No"){
Header("Location: ".$adminfile.".php?adminload=$modulename&plugin=Admin_Mensajes");
}

it works bad

this says brownser:

Warning: Cannot add header information - headers already sent by (output started at d:\easyphp\www\zentri\core.php:662) in d:\easyphp\www\zentri\plugins\admin\GaxBox\plugins\Admin_Mensajes\index.php on line 39

What is the problem??
somebody can help me?
thanks

You know it has to be before ANYTHING is outputted. Also, if you use both of those, you should make sure that the first one is not used when the second one is.

This issue is not a General CHat topic. It is a scripting question. Thusly, it should be in the Scripting forum,

Moved

Actully u r sending header after sending body elements
i far i know in php it is not allowed
so u have to check that carefully in source code also check this out

http://www.oreilly.com/catalog/phpckbk/chapter/ch08.pdf

as everyone else has already said the header tag can only be used before anything is shown such as text etc but not processing.
As the time cannot be set before the redirection there really is very little point in displaying anything so unless your displaying errors and havent excluded it theres no point for anything apart from the processing and the header command.

If however you do want other info displayed or want a certain amount of time before the redirection takes place you should consider using a meta version

I wouldn't recommend Meta Refresh because there is an option for people to turn it off in their browser.

- Mike.

use gzip on your page, which stores the output of the script, runs the headers, then shows the output so that error doesn't show. normally you have to output headers before anything else is outputted to the screen.

This problem occurs when you have output some data before a Header(Location). Looks like in your case, the output was done in file

d:\easyphp\www\zentri\core.php

Line number 662.

see that you do not have output any data before header method. It should solve the problem.

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