Class wow_Rss - Display Multiple RSS in your WP Theme

<?php
/**
*   Class to return multiple RSS feeds in WordPress
*       Instructions:
*       1.  Upload this class to theme folder
*       2.  Include this class in functions.php  ie:  include "mytheme/wow_rss.php";

*       In theme template:
*       3.  Create new object of class ie: $obj = new wow_Rss ("http://www.mywebsite.co.uk/feed","5");
*               Enter feed url as 1st argument and how many items from that feed as the 2nd
*       4.  Display that object ie: echo '<ul class="myfeed">'.$obj.'</ul>';
*               Didn't include <ul> in class so that you can style the individual classes
*       5.  Repeat 3 & 4 with other feeds
*
*       Optional - You can limit the class to use on certain pages or posts using WP is_page(), is_post() etc
*       Tips -     Get it working first before editing display_rss(),make small changes to track errors easier
*
**/

class wow_Rss
    {
        public $feed = null;
        public $url = null;
        public $maxitems = null;

        /**
         *   __construct
         *
         *    pass values when class is istantiated
         *
         * @param string  $url      The URL You want to fetch
         * @param numeric $maxitems How many items you want to fetch
         */


        public function __construct($url, $maxitems)
            {
                $this->url      = $url;
                $this->maxitems = $maxitems;
            }

        /**
         *   get_first_image_url
         *
         *   Looks for first image in string
         *
         * @param  string   $html
         * @return string
         */

        public function get_first_image_url($html)
            {
                if (preg_match('/<img.+?src="(.+?)"/', $html, $matches))
                    {
                        return $matches[1];
                    }
            }

        /**
         *   shorten
         *
         *   Creates an excerpt of description
         *
         * @param  string $string  The feed
         * @param  numeric $length  How many characters to limit to
         * @return string   returns shortened text
         */

        public function shorten($string, $length)
            {
                $suffix     = '&hellip;';
                $short_desc = trim(str_replace(array(
                        "/r",
                        "/n",
                        "/t"
                ), ' ', strip_tags($string)));
                $desc       = trim(substr($short_desc, 0, $length));
                $lastchar   = substr($desc, -1, 1);
                if ($lastchar == '.' || $lastchar == '!' || $lastchar == '?')
                        $suffix = '';
                $desc .= $suffix;
                return $desc;
            }
        /**
         *   get_comments
         *
         *   Gets the number of comments
         *
         * @param  string $item  the feed
         * @return string The correct number of comments
         */

        public function get_comments($item)
            {
                $comments = $item->get_item_tags('http://purl.org/rss/1.0/modules/slash/', 'comments');
                $number   = $comments[0]['data'];
                if ($number == '1')
                    {
                        return $number . '&nbsp;' . 'Comment';
                    }
                else
                    {
                        return $number . '&nbsp;' . 'Comments';
                    }
            }
        /**
         *   __tostring
         *
         *   Converts obj to a string
         *
         * @return string displays rss feed
         */

        public function __toString()
            {
                return $this->display_rss();
            }

        /**
         *   display_rss
         *
         *   fetches feed , checks for errors, uses get_comments, shorten, get_first_img_url
         *
         */

        public function display_rss()
            {
                $feed      = '';
                $rss_items = '';

                $rss = fetch_feed($this->url);//uses built in simplepie to fetch feeds

                if (!is_wp_error($rss)):
                        $maxitems  = $rss->get_item_quantity($this->maxitems);
                        $rss_items = $rss->get_items(0, $maxitems);
                endif;

                if (!is_array($rss_items) || $maxitems == 0)
                    {
                        $feed .= '<li>No items.</li>';
                    }
                else
                foreach ($rss_items as $item):
                        $feed .= '<li class="item">';

                        $feed .= '<span class="rss-image">
                                    <img src="' . $this->get_first_image_url($item->get_content()) . '"/>
                                  </span>';

                        $feed .= '<span class"data">
                                    <h5>
                                        <a href="'
                                        . esc_url($item->get_permalink()) . '" title="'
                                        . esc_html($item->get_title()) . '">'
                                        . esc_html($item->get_title()) .
                                        '</a>

                                    </h5>';
                        $feed .= '<span class="date-image">&nbsp;</span>';
                        $feed .= '<small>' . $item->get_date('F Y') . ' </small>';
                        $feed .= '<span class="comment-image">&nbsp;</span>';
                        $feed .= '<small>' . $this->get_comments($item) . '</small>';
                        $feed .= '<p>' . $this->shorten($item->get_description(), '150') . '</p>

                                </span>
                                </li>';
                endforeach;
                return $feed;
            }
    }