Hi. I have 2 websites, 100% identical, except for configuration.php file, and of course the physical server.
On original site, my Joomla extension module RSS Marquee (Gopiplus) works 100%, but not on my new site.
Original Site: cybersec.group - RSS works Fine
New Site: cybersec.co.nz - RSS does not get feed

Expected result

Feed RSS normaly

Actual result

Undefined variable: http_response_header in home/user/path/modules/mod_rss_marquee/helper.php on line 32

System information (as much as possible)

Joomla 3.7.5
RSS Marquee 3.6
Server PHP version 4.6.6

Additional comments

1. Ther expected RSS feed is located underneath Image Slider.
   CODE FOR DOCUMENT POINTED OUT IN ERROR= PHP

`<?php
/**

• RSS Marquee
• @Package RSS Marquee
• @subpackage RSS Marquee
• @Version 3.6
• @author Gopi Ramasamy
• @copyright Copyright (C) 2010 - 2016 www.gopiplus.com, LLC
• @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
• http://www.gopiplus.com/extensions/2012/03/scrolling-rss-marquee-joomla-module/
  */

// No direct access
defined('_JEXEC') or die;

class modMarquee
{
public static function getMarquee($args)
{
$rss = $args["marquee_rss"];
$items = array();
$j = 0;
$MarqueeTitle = "";
$MarqueeLink = "";

	if($rss <> "")
	{
		$xml = "";
		$content = @file_get_contents($rss);
		if (strpos($http_response_header[0], "200")) 
		{
			$f = fopen( $rss, 'r' );
			while( $data = fread( $f, 4096 ) ) { $xml .= $data; }
			fclose( $f );
			preg_match_all( "/\<item\>(.*?)\<\/item\>/s", $xml, $itemblocks );
			
			if ( ! empty($itemblocks) ) 
			{
				foreach( $itemblocks[1] as $block )
				{
					preg_match_all( "/\<title\>(.*?)\<\/title\>/",  $block, $title );
					preg_match_all( "/\<link\>(.*?)\<\/link\>/", $block, $link );
					
					$MarqueeTitle = $title[1][0];
					$MarqueeTitle = trim($MarqueeTitle);
					$MarqueeLink = $link[1][0];
					$MarqueeLink = trim($MarqueeLink);
			
					$items[$j] = new stdClass;
					$items[$j]->marque_title = $MarqueeTitle;
					$items[$j]->marque_link	= $MarqueeLink;
					$j = $j+1;
				}
			}
		}
		else
		{
			echo "Invalid or Broken rss link.";
		}
	}
	return $items;
}	

}
?>`