Example:
$vz = new Vizhash16x16();
$data = $vz->generate(sha512('hello'));
header('Content-type: image/png');
echo $data;
exit;
/**
* Set nickname.
*
* @access public
* @param string $nickname
* @throws Exception
* @return void
*/
public function setNickname($nickname)
{
if (!Sjcl::isValid($nickname)) {
throw new Exception('Invalid data.', 66);
}
$this->_data->meta->nickname = $nickname;
// If a nickname is provided, we generate an icon based on a SHA512 HMAC
// of the users IP. (We assume that if the user did not enter a nickname,
// the user wants to be anonymous and we will not generate an icon.)
$icon = $this->_conf->getKey('icon');
if ($icon != 'none') {
$pngdata = '';
$hmac = TrafficLimiter::getHash();
if ($icon == 'identicon') {
$identicon = new Identicon();
$pngdata = $identicon->getImageDataUri($hmac, 16);
} elseif ($icon == 'vizhash') {
$vh = new Vizhash16x16();
$pngdata = 'data:image/png;base64,' . base64_encode($vh->generate($hmac));
}
if ($pngdata != '') {
$this->_data->meta->vizhash = $pngdata;
}
}
// Once the icon is generated, we do not keep the IP address hash.
}
