CodeIgniter RSS output as a valid feed - php

Question

I Cannot get the RSS to work as a valid feed. This the rss: http://mimjob.com/news/rss
PHP:
<?php ob_start(); echo'<?xml version="1.0" encoding="utf-8" ?>' . "\n"; ?>
<rss version="2.0"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
xmlns:admin="http://webns.net/mvcb/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:content="http://purl.org/rss/1.0/modules/content/">
<channel>
<title><?php echo $feed_name; ?> </title>
<link><?php echo $feed_url; ?> </link>
<description><?php echo $page_description; ?></description>
<dc:language><?php echo $page_language; ?></dc:language>
<dc:creator><?php echo $creator_email; ?></dc:creator>
<dc:rights>Copyright <?php echo gmdate("Y", time()); ?></dc:rights>
<admin:generatorAgent rdf:resource="http://www.mzksh.com/" />
<?php foreach($news->result() as $n): ?>
<item>
<title><?php echo xml_convert($n->title); ?></title>
<link><?php echo base_url('news/get/' . $n->id) ?></link>
<guid><?php echo base_url('news/get/' . $n->id) ?></guid>
<description><![CDATA[<?php echo character_limiter($n->text, 200); ?>]]></description>
<pubDate><?php echo $n->date;?></pubDate>
</item>
<?php endforeach; ?>
</admin:generatoragent>
</channel>
</rss>
<?php
$output = ob_get_contents();
ob_end_clean();
echo $output;
?>
I've added ob_start to remove empty spaces but still can't get it to work. I've also checked if there are any white spaces before <?php.
I'm using codeigniter framework.

Answer 1

That's because CodeIgniter handles all outputs via its Output Class.
First remove the ob_start section from the view file, then change the current Content-type and output by this way:
class Home extends CI_Controller
{
public function rss()
{
$data = $this->load->view('your_rss_view_file', '', TRUE);
$this->output
->set_content_type('application/rss+xml') // This is the standard MIME type
->set_output($data); // set the output
}
}

Answer 2

You simply need to put the xml headers before you echo something to the browser. Example:
class homepage extends CI_Controller{
function index(){
header("Content-type: text/xml; charset=utf-8");
$this->load->view('my_view_file'); // this is your code from the example
}
}