gistfile1.php

<?php
/**
 * Created by JetBrains PhpStorm.
 * User: Vuokko
 * Date: 12/06/13
 * Time: 19:52
 * To change this template use File | Settings | File Templates.
 */

// Turn off all error reporting, otherwise you get some fucked up DOMelement warnings :p
error_reporting(0);


/**
 * @param $thread the URL of the thread in the form: http://boards.4chan.org/p/res/2016557
 */
function getImageUrls($thread) {
    $chanhtml = file_get_contents($thread);
    $dom = new DOMDocument();
    $dom->recover = true;
    $dom->strictErrorChecking = FALSE;
    $dom->loadHTML($chanhtml);
    $xpath = new DOMXPath($dom);
    $nodelist = $xpath->query("//span[@class='fileText']/a");
    foreach ($nodelist as $node) {
        //echo "\n$node->tagName";
        echo "http://images.4chan.org/p/src/" . getData($node);
    }
}

/**
 * @param $node recursive method to get the data from the document
 * @return string what's between <a href="herpderp"> and </a>
 */
function getData($node) {
    foreach ($node->childNodes as $child) {

        if ($child->nodeType == XML_ELEMENT_NODE) {
            return ($child->tagName === '' ? '' : "\n").$child->tagName;
        }

        if ($child->nodeType == XML_TEXT_NODE) {
            return $child->nodeValue;
        }

        if ($child->hasChildNodes()) {
            return getData($child); // recursive call
        }
    }
}

echo "derp";

?>