php加js实现微信分享

js:


 php:

appId = empty($appId) ? '你的appID' : $appId;
        $this->appSecret = empty($appSecret) ? '你的appSecret' : $appSecret;
    }

    public function getSignPackage($url)
    {
        $jsapiTicket = $this->getJsApiTicket();

        // 注意 URL 一定要动态获取,不能 hardcode.
        //$protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
        //$url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

        $timestamp = time();
        $nonceStr = $this->createNonceStr();

        // 这里参数的顺序要按照 key 值 ASCII 码升序排序
        $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr×tamp=$timestamp&url=$url";

        $signature = sha1($string);

        $signPackage = array(
            "appId" => $this->appId,
            "nonceStr" => $nonceStr,
            "timestamp" => $timestamp,
            "url" => $url,
            "signature" => $signature,
            "rawString" => $string
        );
        return $signPackage;
    }

    private function createNonceStr($length = 16)
    {
        $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        $str = "";
        for ($i = 0; $i < $length; $i++) {
            $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
        }
        return $str;
    }

    private function getJsApiTicket()
    {
        // jsapi_ticket 应该全局存储与更新,写入到redis
        $redisObj = new Predis();
        $JsApi_expire_time = $redisObj->getInstance()->get('JsApi_expire_time');
        if ($JsApi_expire_time < time()) {
            $accessToken = $this->getAccessToken();
            // 如果是企业号用以下 URL 获取 ticket
            // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
            $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
            $res = json_decode($this->httpGet($url));
            $ticket = $res->ticket;
            if ($ticket) {
                $redisObj->getInstance()->set('JsApi_expire_time',time()+7000);
                $redisObj->getInstance()->set('jsapi_ticket',$ticket);
            }
        } else {
            $ticket = $redisObj->getInstance()->get('jsapi_ticket');
        }

        return $ticket;
    }

    private function getAccessToken()
    {
        // access_token 应该全局存储与更新,写入到redis
        $redisObj = new Predis();

        $access_expire_time = $redisObj->getInstance()->get('access_expire_time');

        if ($access_expire_time < time()) {
            // 如果是企业号用以下URL获取access_token
            // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
            $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
            $res = json_decode($this->httpGet($url));
            $access_token = $res->access_token;
            if ($access_token) {
                $redisObj->getInstance()->set('access_expire_time',time()+7000);
                $redisObj->getInstance()->set('access_token',$access_token);
            }
        } else {
            $access_token = $redisObj->getInstance()->get('access_token');
        }
        return $access_token;
    }

    private function httpGet($url)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        // 为保证第三方服务器与微信服务器之间数据传输的安全性,所有微信接口采用https方式调用,必须使用下面2行代码打开ssl安全校验。
        // 如果在部署过程中代码在此处验证失败,请到 http://curl.haxx.se/ca/cacert.pem 下载新的证书判别文件。
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, true);
        curl_setopt($curl, CURLOPT_URL, $url);

        $res = curl_exec($curl);
        curl_close($curl);

        return $res;
    }
}

有一个地方需要注意的是还有script获取的地址一定是要转码过的,不带#的,下面这段话是微信官方给的:

1.确认签名算法正确,可用http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=jsapisign 页面工具进行校验。

2.确认config中nonceStr(js中驼峰标准大写S), timestamp与用以签名中的对应noncestr, timestamp一致。

3.确认url是页面完整的url(请在当前页面alert(location.href.split('#')[0])确认),包括'http(s)://'部分,以及'?'后面的GET参数部分,但不包括'#'hash后面的部分。

4.确认 config 中的 appid 与用来获取 jsapi_ticket 的 appid 一致。

5.确保一定缓存access_token和jsapi_ticket。

6.确保你获取用来签名的url是动态获取的,动态页面可参见实例代码中php的实现方式。如果是html的静态页面在前端通过ajax将url传到后台签名,前端需要用js获取当前页面除去'#'hash部分的链接(可用location.href.split('#')[0]获取,而且需要encodeURIComponent),因为页面一旦分享,微信客户端会在你的链接末尾加入其它参数,如果不是动态获取当前链接,将导致分享后的页面签名失败。

(注:红色部分是重点部分)

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