Simple tumblr image downloader.

tumblr.php

<?php
define('IMGDIR','./img');
require('sites.php');

foreach($sites as $site){
  $rss = get_rss('http://'.$site.'.tumblr.com/rss');
  if(count($rss)>0){
    if(!is_dir(IMGDIR.'/'.$site)){
      mkdir(IMGDIR.'/'.$site,0700,true);
    }   
    foreach($rss as $item){
      if(preg_match('/\.jpg$/',$item['img'])){
        $fn = IMGDIR.'/'.$site.'/'.$item['date'].'.jpg';
        if(!is_file($fn)){
          print "$fn\n";
          $fp = fopen($fn,'w');
          fwrite($fp,file_get_contents($item['img']));
          fclose($fp);
        }
      }   
    }   
  }
}

function get_rss($url){
  print "$url\n";
  $entries = array();
  $dom = new DOMDocument();
  @$dom->loadXML(file_get_contents($url));
  $xpath = new DOMXPath($dom);
  $nodes = $xpath->query("//item");

  foreach ($nodes as $node) {
      $subdom = new DOMDocument();
      @$subdom->loadXML('<desc>'.html_entity_decode($node->nodeValue).'</desc>');
        $subxpath = new DOMXPath($subdom);
        if(is_object($subxpath->query("//desc/img")->item(0))){
          $img = $subxpath->query("//desc/img")->item(0)->getAttribute('src');
          $guid = $xpath->query(".//guid",$node)->item(0)->nodeValue;
          $date = strtotime($xpath->query(".//pubDate",$node)->item(0)->nodeValue);
          array_push($entries,array('img'=>$img,'guid'=>$guid,'date'=>$date));
        }
  }
  return $entries;
}