RSS tutorial

[mediaguy2004]

Hello guys I am working on the rss tutorial. I did get it to work but I am having a problem.

I am getting this error

Warning: Cannot add header information - headers already sent by (output started at /var/www/html/news_rss/Test2.php:8) in /www/news_rss/Test2.php on line 56.
 
Can any one tell me what this means.
Below is the code

Thanks for your help..


<?php
include "config.php";

$link = mysql_connect($config['db_host'],$config['db_user'],$config['db_pass']) or die();
mysql_select_db($config['db_name']) or die();

$news_headlines    = mysql_query("SELECT n.*,a.* FROM news AS n LEFT JOIN authors AS a ON a.aid=n.n_author_id ORDER BY n.n_time DESC".(is_numeric($config['headlines']) && $config['headlines']>0 ? " LIMIT {$config['headlines']}" : null));
$items_output    = null;
if(mysql_num_rows($news_headlines))
{
    while($headline = mysql_fetch_assoc($news_headlines))
    {
        $link            = htmlentities("http://example.com/index.php?act=news&id={$headline['nid']}");
        $pubdate        = gmdate('r',$headline['n_time']);
        $author            = $config['show_author_info'] ? "nttt<author>{$headline['a_email']} ({$headline['a_name']})</author>" : null;
        $description    = nl2br($headline['n_body']);
       
        $items_output .= <<<EOF

        <item>
            <title>{$headline['n_title']}</title>
            <description>
                {$description}
            </description>
            <link>{$link}</link>
            <pubDate>{$pubdate}</pubDate>{$author}
        </item>
EOF;
    }
}

$config['encoding']    = empty($config['encoding']) ? 'ISO-8859-1' : $config['encoding'];
$copyright            = empty($config['copyright']) ? null : "ntt<copyright>".str_replace('{year}',date('Y'),$config['copyright'])."</copyright>";
$pubdate            = $config['show_feed_pubdate'] ? "ntt<pubDate>".gmdate('r')."</pubDate>" : null;
$language            = empty($config['language']) ? null : "ntt<language>{$config['language']}</language>";

$output = <<<EOF
<?xml version="1.0" encoding="{$config['encoding']}" ?>
<rss version="2.0">
    <channel>
        <title>{$config['feed_title']}</title>
        <link>{$config['link']}</link>
        <description>{$config['description']}</description>{$copyright}{$pubdate}{$language}{$items_output}
    </channel>
</rss>

EOF;

header("Content-type: application/xml; charset={$config['encoding']}");
echo $output;
?>

[Jessica]

You should read the topic on header errors. You can't output before setting the header.

[mediaguy2004]

Do you have a link to it I will try to seach for it..

[simcoweb]

http://www.phpfreaks.com/forums/index.php/topic,37442.0.html

[mediaguy2004]

Thanks Guys My seaches where turnig up everything on errors.

[mediaguy2004]

OK How do you do that  Iam stiil a newbie on php..

[corbin]

You must send header("Content-type: application/xml; charset={$config['encoding']}"); to the browser before ANYTHING else even if it's just whitespace (you can have whitespace in your php scripts; it just cannot be outputted to the browser.)

Try moving that line to the top of the file.

[mediaguy2004]

OK I tried it, It will give me the page with out the xml page jus a plain html page with the error. Plus I tried a couple of things.
when I leave it alone I can see all the info from the headlines table  and not author table
when I make this change - I removed the header Info form the config file. That gaves me the xml page

Then I get this error
The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error

Then this error too

Only one top level element is allowed in an XML document. Error processing resource 'http://localhost/test_rss/rss.php'. Line 8, Position 2


<b>Warning</b>:  Cannot add header information - headers already sent by (output started at /www/test_rss/rss.php:5) in <b>www/test_rss/rss.php</b> on line <b>53</b><br />
anyone has any ideas

Thanks