Get and extract imagr from github. Dirty but works. Uses 2MB RAM max.

imagr.php

<?php
$od = $_REQUEST['dir'];
$ul = $_REQUEST['ul'];
if($ul == "true"){$ul = true;}else{$ul = false;}
if(is_dir($od) || file_exists($od) || strlen($od) < 3 || strpos($od,"..") !== false){die("u made shit, dir is undefined");}
$server = "codeload.github.com";
$sock = fsockopen("ssl://" . $server,443);
fputs($sock,"GET /danieltroger/imagr/zip/master HTTP/1.1\nHost: {$server}\r\n\r\n");
$h = fopen("tmp.zip","w");
$p = false;
while($data = fread($sock,1048576))
{
  if(!$p)
  {
    $l = explode("\r\n\r\n",$data);
    unset($l[0]);
    fwrite($h,implode("\r\n\r\n",$l));
    $p = true;
  }
  else
  {
    fwrite($h,$data);
  }
}
fclose($h);
fclose($sock);
$zip = new ZipArchive;
$zip->open("tmp.zip");
$zip->extractTo('.');
$zip->close();
unlink("tmp.zip");
if(!$ul){unlink("imagr-master/upload.php");}
rename("imagr-master",$od);
header("Location: {$od}");