public function unzip($sqlZipFile) {
		if (file_exists ( $sqlZipFile )) {
			$zip = new \ZipArchive ();
			$result = $zip->open ( $sqlZipFile );
			if ($result === true) {
				$zip->extractTo ( dirname ( $sqlZipFile ) );
				$zip->close ();
				$sqlZipFile = str_replace ( ".zip", "", $sqlZipFile );
			}
		}
		return $sqlZipFile;
	}