微信分享自定义分享链接图文

1、 绑定域名 先登录微信公众平台进入“公众号设置”的“功能设置”里填写“JS接口安全域名”（就是发布用的那个域名）

2、获取access_token和生成签名

<?php
class WXShare {
    private $appId;
    private $appSecret;

    public function __construct($appId, $appSecret) {
        $this->appId = $appId;
        $this->appSecret = $appSecret;
    }

    public function getSignPackage() {
        $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]";
        //二次分享会带form=，会导致签名错误，所以需要单独处理
        $pos = strpos($url,'form=');
        if($pos !== false){
            $url = substr($url,0,$pos-1);
        }


        $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() {
        //将数据存储在redis，防止达到上限
        $redis = PublicOperationRedis::getInstance();
        if($redis->get($this->appId.":ticket")){
            return $redis->get($this->appId.":ticket");
        }
        $accessToken = $this->getAccessToken();
        $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
        $res = json_decode($this->httpGet($url));
        $ticket = $res->ticket;
        if($ticket){
            $redis->set($this->appId.":ticket",$ticket,7200);
        }
        return $ticket;
    }

    private function getAccessToken() {
        $redis = PublicOperationRedis::getInstance();
        if($redis->get($this->appId)){
            return $redis->get($this->appId);
        }
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
        $res = json_decode($this->httpGet($url));
        $access_token = $res->access_token;
        if($access_token){
            $redis->set($this->appId,$access_token,7200);
        }
        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;
    }
}

3、编写js代码

　　

<script type="text/javascript" src='https://res.wx.qq.com/open/js/jweixin-1.0.0.js'></script>
  <script type="text/javascript">
  wx.config({
    debug: false,
    appId: '{$signPackage["appId"]}',
    timestamp: '{$signPackage["timestamp"]}',
    nonceStr: '{$signPackage["nonceStr"]}',
    signature: '{$signPackage["signature"]}',
    jsApiList: [
        'checkJsApi',
        'onMenuShareTimeline',
        'onMenuShareAppMessage',
        'onMenuShareQQ',
        'onMenuShareWeibo',
        'onMenuShareQZone'
    ]
  });
  </script>

wx.ready(function () {
        //分享到朋友圈
        wx.onMenuShareTimeline({
            title: "title",
            link:'url',
            imgUrl: 'pic', // 分享图标
            success: function () {
                // 分享成功执行此回调函数
               // alert('分享成功');
            },
            cancel: function () {
                //alert('分享失败');
            }
        });

        //分享给朋友
        wx.onMenuShareAppMessage({
            title: "title",
            link:'utl',
            desc: "desc",
            imgUrl: "pic", // 分享图标
            trigger: function (res) {
                // 不要尝试在trigger中使用ajax异步请求修改本次分享的内容，因为客户端分享操作是一个同步操作，这时候使用ajax的回包会还没有返回
            },
            success: function (res) {
                // 分享成功执行此回调函数
                //alert('已分享');
            },
            cancel: function (res) {
                alert('已取消');
            },
            fail: function (res) {
                //alert(JSON.stringify(res));
            }
        });
    });

　

以上为微信分享图文链接操作方式