Writes QR code and returns it as string.
Content is a string which *should* be encoded in UTF-8, in case there are non ASCII-characters present.
@param string $content @param string $encoding @param integer $ecLevel @return string @throws Exception\InvalidArgumentException
See Implementation
Writes QR code and returns it as string.
Content is a string which *should* be encoded in UTF-8, in case there are non ASCII-characters present.
@param string $content @param string $encoding @param integer $ecLevel @return string @throws Exception\InvalidArgumentException