protected function _extractByPhpLib($source, $target)
{
if ($this->Zip->open($source) === true && $this->Zip->extractTo($target)) {
$archivePath = $this->Zip->getNameIndex(0);
$archivePathAry = explode(DS, $archivePath);
$this->topArchiveName = $archivePathAry[0];
return true;
} else {
return false;
}
}