php部分：
//单项登陆，站点用户登陆多说用户
$this->load->library('Jwt');加载类库
$token = array(
"short_name"=>"mhhyoucom",
"user_key"=>"8",
"name"=>"小张",
);
$duoshuoToken = JWT::encode($token, '多说密钥');
setcookie('duoshuo_token',$duoshuoToken);//设置cookie提供多说识别
$this->load->view('duoshuo/duoshuo');
html部分：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>多说测试文档</title>
</head>
<body>
<!-- 多说评论框 start -->
<div class="ds-thread" data-thread-key="11" data-title="网站首页" data-url="http://www.s.com"></div>
<!-- 多说评论框 end -->
<!-- 多说公共JS代码 start (一个网页只需插入一次) -->
<!--用户注册时二级域名 例如： ceshi.duoshuo.com 就是 ceshi-->
<script type="text/javascript">
var duoshuoQuery = {short_name:"用户注册时二级域名",sso:{
login:'网站用户登陆url',
logout:'网站用户推出url'
}};
(function() {
var ds = document.createElement('script');
ds.type = 'text/javascript';ds.async = true;
ds.src = (document.location.protocol == 'https:' ? 'https:' : 'http:') + '//static.duoshuo.com/embed.js';
ds.charset = 'UTF-8';
(document.getElementsByTagName('head')[0]
|| document.getElementsByTagName('body')[0]).appendChild(ds);
})();
</script>
<!-- 多说公共JS代码 end -->
</body>
</html>
jwt 类 ：
<?php
/**
* JSON Web Token implementation
*
* Minimum implementation used by Realtime auth, based on this spec:
* http://self-issued.info/docs/draft-jones-json-web-token-01.html.
*
* @author Neuman Vong <neuman@twilio.com>
*/
class Jwt
{
/**
* @param string $jwt The JWT
* @param string|null $key The secret key
* @param bool $verify Don't skip verification process
*
* @return object The JWT's payload as a PHP object
*/
public static function decode($jwt, $key = null, $verify = true)
{
$tks = explode('.', $jwt);
if (count($tks) != 3) {
throw new UnexpectedValueException('Wrong number of segments');
}
list($headb64, $payloadb64, $cryptob64) = $tks;
if (null === ($header = JWT::jsonDecode(JWT::urlsafeB64Decode($headb64)))
) {
throw new UnexpectedValueException('Invalid segment encoding');
}
if (null === $payload = JWT::jsonDecode(JWT::urlsafeB64Decode($payloadb64))
) {
throw new UnexpectedValueException('Invalid segment encoding');
}
$sig = JWT::urlsafeB64Decode($cryptob64);
if ($verify) {
if (empty($header->alg)) {
throw new DomainException('Empty algorithm');
}
if ($sig != JWT::sign("$headb64.$payloadb64", $key, $header->alg)) {
throw new UnexpectedValueException('Signature verification failed');
}
}
return $payload;
}
/**
* @param object|array $payload PHP object or array
* @param string $key The secret key
* @param string $algo The signing algorithm
*
* @return string A JWT
*/
public static function encode($payload, $key, $algo = 'HS256')
{
$header = array('typ' => 'jwt', 'alg' => $algo);
$segments = array();
$segments[] = JWT::urlsafeB64Encode(JWT::jsonEncode($header));
$segments[] = JWT::urlsafeB64Encode(JWT::jsonEncode($payload));
$signing_input = implode('.', $segments);
$signature = JWT::sign($signing_input, $key, $algo);
$segments[] = JWT::urlsafeB64Encode($signature);
return implode('.', $segments);
}
/**
* @param string $msg The message to sign
* @param string $key The secret key
* @param string $method The signing algorithm
*
* @return string An encrypted message
*/
public static function sign($msg, $key, $method = 'HS256')
{
$methods = array(
'HS256' => 'sha256',
'HS384' => 'sha384',
'HS512' => 'sha512',
);
if (empty($methods[$method])) {
throw new DomainException('Algorithm not supported');
}
return hash_hmac($methods[$method], $msg, $key, true);
}
/**
* @param string $input JSON string
*
* @return object Object representation of JSON string
*/
public static function jsonDecode($input)
{
$obj = json_decode($input);
if (function_exists('json_last_error') && $errno = json_last_error()) {
JWT::handleJsonError($errno);
}
else if ($obj === null && $input !== 'null') {
throw new DomainException('Null result with non-null input');
}
return $obj;
}
/**
* @param object|array $input A PHP object or array
*
* @return string JSON representation of the PHP object or array
*/
public static function jsonEncode($input)
{
$json = json_encode($input);
if (function_exists('json_last_error') && $errno = json_last_error()) {
JWT::handleJsonError($errno);
}
else if ($json === 'null' && $input !== null) {
throw new DomainException('Null result with non-null input');
}
return $json;
}
/**
* @param string $input A base64 encoded string
*
* @return string A decoded string
*/
public static function urlsafeB64Decode($input)
{
$remainder = strlen($input) % 4;
if ($remainder) {
$padlen = 4 - $remainder;
$input .= str_repeat('=', $padlen);
}
return base64_decode(strtr($input, '-_', '+/'));
}
/**
* @param string $input Anything really
*
* @return string The base64 encode of what you passed in
*/
public static function urlsafeB64Encode($input)
{
return str_replace('=', '', strtr(base64_encode($input), '+/', '-_'));
}
/**
* @param int $errno An error number from json_last_error()
*
* @return void
*/
private static function handleJsonError($errno)
{
$messages = array(
JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
JSON_ERROR_CTRL_CHAR => 'Unexpected control character found',
JSON_ERROR_SYNTAX => 'Syntax error, malformed JSON'
);
throw new DomainException(isset($messages[$errno])
? $messages[$errno]
: 'Unknown JSON error: ' . $errno
);
}
}
?>