public function encodeString8bit($string, $version, $level)
{
if (string == NULL) {
throw new Exception('empty string!');
return NULL;
}
$input = new wechat_qrcode_QRinput($version, $level);
if ($input == NULL) {
return NULL;
}
$ret = $input->append($input, QR_MODE_8, strlen($string), str_split($string));
if ($ret < 0) {
unset($input);
return NULL;
}
return $this->encodeInput($input);
}
