private function _extractPackageName($filename) {
		$filename = str_replace('/', '.', $filename);
		$filename = str_replace('\\', '.', $filename);
		while (strpos($filename, '.') === 0) {
			$filename = substr($filename, 1);
		}
		if (strlen($filename) > 4) { // remove the .php at the end
			$filename = substr($filename, 0, -4);
		}

		// Identify the package name
		$packageName = substr($filename, 0, strrpos($filename, '.'));

		return $packageName;
	}