<?php

function recurse_copy($src, $dst, $mode = 0775) {

  if (substr($src, -1) != '/') {
    $src .= '/';
  }

  $files = glob($src .'*', GLOB_MARK);

  if (empty($files)) {
    //drush die or something similar
  }

  mkdir($dst, $mode, $recursive = TRUE);

  foreach ($files as $file) {

    $file_name = basename($file);

    if (is_dir($file)) {
      recurse_copy($file, $dst .'/'. $file_name);
    } else {
      copy($file, $dst .'/'. $file_name);
    }

  }

}