微信分享

PHP代码：

<?php
$url = urldecode($_GET[‘url‘]);
class JSSDK {
    private $appId;
    private $appSecret;
    private $url;
    public function __construct($appId, $appSecret,$url) {
        $this->appId = "";//appid需要填写
        $this->appSecret = "";//需要填写
        $this->url = $url;

  }

    public function getSignPackage() {
        $jsapiTicket = $this->getJsApiTicket();
        $protocol = (!empty($_SERVER[‘HTTPS‘]) && $_SERVER[‘HTTPS‘] !== ‘off‘ || $_SERVER[‘SERVER_PORT‘] == 443) ? "https://" : "http://";
        // $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
        $url =$this->url;
    $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=$nonceStr&timestamp=$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，以下代码以写入到文件中做示例
        $data = json_decode(file_get_contents("jsapi_ticket.json"));
        if ($data->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) {
                $data->expire_time = time() + 7000;
                $data->jsapi_ticket = $ticket;
                $fp = fopen("jsapi_ticket.json", "w");
                fwrite($fp, json_encode($data));
                fclose($fp);
            }
        } else {
            $ticket = $data->jsapi_ticket;
        }

        return $ticket;
    }

    private function getAccessToken() {
        // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
        $data = json_decode(file_get_contents("access_token.json"));
        if ($data->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) {
                $data->expire_time = time() + 7000;
                $data->access_token = $access_token;
                $fp = fopen("access_token.json", "w");
                fwrite($fp, json_encode($data));
                fclose($fp);
            }
        } else {
            $access_token = $data->access_token;
        }
        return $access_token;
    }

    private function httpGet($url) {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 500);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($curl, CURLOPT_URL, $url);
        $res = curl_exec($curl);
        curl_close($curl);
        return $res;
    }
}

$jssdk = new JSSDK("公众号ID", "公众号密钥",$url);//按照自己的公众号填写
$signPackage = $jssdk->GetSignPackage();
$tmp=json_encode(array (‘appId‘=>$signPackage["appId"],‘timestamp‘=>$signPackage["timestamp"],‘nonceStr‘=>$signPackage["nonceStr"],‘signature‘=>$signPackage["signature"],‘url‘=>$signPackage["url"]));
$callback = $_GET[‘callback‘];
echo $callback.‘(‘.$tmp.‘)‘;
exit;
?>


js部分：

<script type="text/javascript" src="xx/jquery-2.2.3.min.js"  charset="utf-8"></script>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>

<script>
    var url=encodeURIComponent(window.location.href.split(‘#‘)[0]);//分享成功之后再次分享，微信会再url附带额外参数造成二次分享签名错误，这里处理下避免config：invalid signature签名失效
    $.ajax({
        type : "get",
        url : "http://xxx/jssdk.php?url="+url,//替换网址，xxx根据自己jssdk文件位置修改 需要填写
        dataType : "jsonp",
        jsonp: "callback",
        jsonpCallback:"success_jsonpCallback",
        success : function(data){
            wx.config({　　　　 
                debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印
                appId: data.appId,
                timestamp: data.timestamp,
                nonceStr: data.nonceStr,
                signature: data.signature,
                jsApiList: [
                    "onMenuShareTimeline", //分享给好友
                    "onMenuShareAppMessage", //分享到朋友圈
                    "onMenuShareQQ",  //分享到QQ
                    "onMenuShareWeibo" //分享到微博
                ]
            });
        },
        error:function(data){
            // 　alert(JSON.stringify(data));
            //alert("连接失败！");
        }
    });
    wx.ready(function (){
        var shareData = {
            title: ‘‘,//需要填写 
            desc: ‘ ‘,//这里请特别注意是要去除html需要填写
            link: ‘‘,//需要填写
            imgUrl: ‘‘,//需要填写 绝对路径

        };

        wx.onMenuShareAppMessage(shareData);
        wx.onMenuShareTimeline(shareData);
        wx.onMenuShareQQ(shareData);
        wx.onMenuShareWeibo(shareData);
    });
</script>