elFinder\elFinderVolumeDriver::copyFrom PHP Method

    protected function copyFrom($volume, $src, $destination, $name)
    {
        if (($source = $volume->file($src)) == false) {
            return $this->setError(elFinder::ERROR_COPY, '#' . $src, $volume->error());
        }
        $errpath = $volume->path($src);
        if (!$this->nameAccepted($source['name'])) {
            return $this->setError(elFinder::ERROR_COPY, $errpath, elFinder::ERROR_INVALID_NAME);
        }
        if (!$source['read']) {
            return $this->setError(elFinder::ERROR_COPY, $errpath, elFinder::ERROR_PERM_DENIED);
        }
        if ($source['mime'] == 'directory') {
            $stat = $this->stat($this->_joinPath($destination, $name));
            $this->clearcache();
            if ((!$stat || $stat['mime'] != 'directory') && !$this->_mkdir($destination, $name)) {
                return $this->setError(elFinder::ERROR_COPY, $errpath);
            }
            $path = $this->_joinPath($destination, $name);
            foreach ($volume->scandir($src) as $entr) {
                if (!$this->copyFrom($volume, $entr['hash'], $path, $entr['name'])) {
                    return false;
                }
            }
        } else {
            // $mime = $source['mime'];
            // $w = $h = 0;
            if ($dim = $volume->dimensions($src)) {
                $s = explode('x', $dim);
                $source['width'] = $s[0];
                $source['height'] = $s[1];
            }
            if (($fp = $volume->open($src)) == false || ($path = $this->_save($fp, $destination, $name, $source)) == false) {
                $fp && $volume->close($fp, $src);
                return $this->setError(elFinder::ERROR_COPY, $errpath);
            }
            $volume->close($fp, $src);
        }
        return $path;
    }