Warning: Cannot modify header information - headers already sent

lucilue2003

Warning: Cannot modify header information - headers already sent by (output started at /home/mysite/public_html/design/includes/header_tags.php:78) in /home/mysite/public_html/design/includes/functions.php on line 3

<?php
require('../../design/includes/application_top.php');
require (HOME_DIRECTORY. 'design/includes/header_tags.php');
require('banner_functions.php');
?>

<?php require (HOME_DIRECTORY . 'design/includes/header2.html'); ?>

<a href="<?php echo $PHP_SELF . '?do=banner_stats'; ?>">Stats</a>
<a href="<?php echo $PHP_SELF . '?do=banner_upload'; ?>">Add Banner</a>
<a href="<?php echo $PHP_SELF . '?do=banner_check_links'; ?>">Dead Banners</a>

<?php
if ($GET['do'] == "banner_stats")
require ($GET['do'] . '.php');
else if ($GET['do'] == "banner_upload")
require ($GET['do'] . '.php');
else if ($GET['do'] == "banner_check_links")
require ($GET['do'] . '.php');
?>

I know that i can add the line below to my .htaccess file to make it go away...

PHP_FLAG output_buffering on

but i want to know what is causing it..

and i have researched it online and verified that there is no output before or after <? .. ?>

header_tags.php:78
<?php
$title = "my Site" ; ....
?>
line 76: <html>
line 77: <head>
line 78: <?php echo $title; ?>
line 79: <META name="description" content="<?php echo $meta_name_description; ?>">

functions.php on line 3
line1: <?php
line2: function redirect_to_url($url) {
line3: header('Location: ' . $url);
line4: }
line5: function get_myoperating_system($agent){

thanks for ur help.

bpat1434

My guess is that you're calling functions.php somewhere in the body of your other page, and the function tries to redirect. You can't do that. The snippets of code aren't really enough. WHere do you call functions.php in your other page(s)? That's where your problem lies. You're not calling it early enough, or you're outputting the page too early.

~Brett

lucilue2003

yes, i'm calling that funciton here
if ($GET['do'] == "banner_stats")
require ($GET['do'] . '.php');

in the banner_stats.php page....

<?php
$banner_query = db_query("select * from banners_history_ignore_ip where banners_history_ignore_ip_machine = '" . $SERVER['REMOTE_ADDR'] . "'" );
$num_rows = db_num_rows($banner_query);
if($num_rows == 0)
db_query("insert into banners_history_ignore_ip values ('" . $SERVER['REMOTE_ADDR'] . "')" );

redirect_to_url("http://www.mysite.com/admin/banner/banner_stats_runstats.php");
?>

Y can't i do that ?

Thanks.

bpat1434

Because you've already ouput html code so the page header has already been sent. The header being content-type, lenght, post & get vars and such. Once it's sent, they're there for good, until you use a meta refresh or they click a link.

~Brett

Weedpacket

Originally posted by lucilue2003
headers already sent by (output started at /home/mysite/public_html/design/includes/header_tags.php:78

and i have researched it online and verified that there is no output before or after <? .. ?>

header_tags.php
line 76: <html>
line 77: <head> [/b]

This counts as output.

bpat1434

As does this:

<?php require (HOME_DIRECTORY . 'design/includes/header2.html'); ?>

<a href="<?php echo $PHP_SELF . '?do=banner_stats'; ?>">Stats</a>
<a href="<?php echo $PHP_SELF . '?do=banner_upload'; ?>">Add Banner</a>
<a href="<?php echo $PHP_SELF . '?do=banner_check_links'; ?>">Dead Banners</a>

<?php
if ($GET['do'] == "banner_stats")
require ($GET['do'] . '.php');