public function extension($path)
	{
		$path = Util::normalizePath($path);

		return $this->adapter->extension($path);
	}
public function extension($path)
	{
		$path = Util::normalizePath($path);

		return $this->adapter->extension($path);
	}
public function extension ( $ path ) { $ path = Util :: normalizePath ( $ path ) ; return $ this -> adapter -> extension ( $ path ) ; }
Extract the file extension from a file path.

@param   string  $path
@return  string
Extract the file extension from a file path .