rss-bridge/bridges/FourchanBridge.php

<?php
class FourchanBridge extends BridgeAbstract
{
    const MAINTAINER = "mitsukarenai";
    const NAME = "4chan";
    const URI = "https://boards.4chan.org/";
    const CACHE_TIMEOUT = 300; // 5min
    const DESCRIPTION = "Returns posts from the specified thread";

    const PARAMETERS = array( array(
          'c'=>array(
            'name'=>'Thread category',
            'required'=>true
          ),
          't'=>array(
            'name'=>'Thread number',
            'type'=>'number',
            'required'=>true
          )
    ));

    public function getURI()
    {
        return static::URI.$this->getInput('c').'/thread/'.$this->getInput('t');
    }

    public function collectData()
    {
        $html = getSimpleHTMLDOM($this->getURI())
      or returnServerError("Could not request 4chan, thread not found");

        foreach ($html->find('div.postContainer') as $element) {
            $item = array();
            $item['id'] = $element->find('.post', 0)->getAttribute('id');
            $item['uri'] = $this->getURI().'#'.$item['id'];
            $item['timestamp'] = $element->find('span.dateTime', 0)->getAttribute('data-utc');
            $item['author'] = $element->find('span.name', 0)->plaintext;

            $file=$element->find('.file', 0);
            if (!empty($file)) {
                $item['image'] = $element->find('.file a', 0)->href;
                $item['imageThumb'] = $element->find('.file img', 0)->src;
                if (!isset($item['imageThumb']) and strpos($item['image'], '.swf') !== false) {
                    $item['imageThumb'] = 'http://i.imgur.com/eO0cxf9.jpg';
                }
            }
            if (!empty($element->find('span.subject', 0)->innertext)) {
                $item['subject'] = $element->find('span.subject', 0)->innertext;
            }

            $item['title'] = 'reply '.$item['id'].' | '.$item['author'];
            if (isset($item['subject'])) {
                $item['title'] = $item['subject'].' - '.$item['title'];
            }

            $content = $element->find('.postMessage', 0)->innertext;
            $content = str_replace('href="#p', 'href="'.$this->getURI().'#p', $content);
            $item['content'] = '<span id="'.$item['id'].'">'.$content.'</span>';
            if (isset($item['image'])) {
                $item['content'] = '<a href="'.$item['image'].'">'
            .'<img alt="'.$item['id'].'" src="'.$item['imageThumb'].'" />'
            .'</a><br>'
            .$item['content'];
            }
            $this->items[] = $item;
        }
        $this->items = array_reverse($this->items);
    }
}