PHP 微信分享页面（图文）

首先确保你的公众号配置没有问题，详细请看： PHP 微信公众号-创建菜单-配置

1、获取签名包

这里需要你的appid 和 开发者密码

//获取签名包
public function getSignPackage() {
    $jsapiTicket = $this->getJsApiTicket();
    $url = "http://$_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
    $tmpArr = array(
            'noncestr' => $nonceStr,
            'timestamp' => $timestamp,
            'jsapi_ticket' => $jsapiTicket,
            'url' => $url
    );

    ksort($tmpArr, SORT_STRING);
    $string1 = http_build_query( $tmpArr );
    $string1 = urldecode( $string1 );
    $signature = sha1( $string1 );

    $signPackage = array(
            "appId"     => $this->appid,
            "nonceStr"  => $nonceStr,
            "timestamp" => $timestamp,
            "url"       => $url,
            "signature" => $signature,
            "rawString" => $string1
    );
    return $signPackage;
}

//获取jsapi_ticket
private function getJsApiTicket() {
   if (S('jsapi_ticket_'.$this->appid)) {
      $ticket = S('jsapi_ticket_'.$this->appid);
   } else {
      $accessToken   =  $this->getToken($this->appid, $this->appsecret);
      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
      $res = $this->request_get($url);
      $ticket = $res['ticket'];
      if ($ticket) {
         S('jsapi_ticket_'.$this->appid, $ticket, 7200);
      }
   }
   return $ticket;
}

/**
 * @param $appid
 * @param $appsecret
 * @return mixed
 * 获取token
 */
public function getToken($appid, $appsecret){
   if (S($appid)) {
      $access_token = S($appid);
   } else {
      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" . $appid . "&secret=" . $appsecret;
      $json  =  file_get_contents($url);
      $result    =  json_decode($json);
      $access_token  =  $result->access_token;
      S($appid, $access_token, 7200);
   }
   return $access_token;
}

/**
* 发送get请求
* @param string $url
* @return bool|mixed
*/
function request_get($url = ''){
  if (empty($url)) {
     return false;
  }
  $json  =  file_get_contents($url);
  $result    =  json_decode($json,true);
  return $result;
}

public 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;
}

2、php控制器 配置图文消息内容，图片等。获取的签名包也要渲染到分享的页面

$invite = array(
　　"Title" 　　　　=> '标题',
　　"Description"　=> '摘要内容',
　　"PicUrl"　　　　=> '图片地址',
　　"Url"   　　　　=> '要分享的页面（就是点击图文进入的页面）'
);

3、页面

首先要引入官方JS：jweixin-1.0.0.js

!function(a,b){"function"==typeof define&&(define.amd||define.cmd)?define(function(){return b(a)}):b(a,!0)}(this,function(a,b){function c(b,c,d){a.WeixinJSBridge?WeixinJSBridge.invoke(b,e(c),function(a){g(b,a,d)}):j(b,d)}function d(b,c,d){a.WeixinJSBridge?WeixinJSBridge.on(b,function(a){d&&d.trigger&&d.trigger(a),g(b,a,c)}):d?j(b,d):j(b,c)}function e(a){return a=a||{},a.appId=z.appId,a.verifyAppId=z.appId,a.verifySignType="sha1",a.verifyTimestamp=z.timestamp+"",a.verifyNonceStr=z.nonceStr,a.verifySignature=z.signature,a}function f(a){return{timeStamp:a.timestamp+"",nonceStr:a.nonceStr,"package":a.package,paySign:a.paySign,signType:a.signType||"SHA1"}}function g(a,b,c){var d,e,f;switch(delete b.err_code,delete b.err_desc,delete b.err_detail,d=b.errMsg,d||(d=b.err_msg,delete b.err_msg,d=h(a,d),b.errMsg=d),c=c||{},c._complete&&(c._complete(b),delete 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a.choose_card_info},a}())},openCard:function(a){var e,f,g,h,b=a.cardList,d=[];for(e=0,f=b.length;f>e;++e)g=b[e],h={card_id:g.cardId,code:g.code},d.push(h);c(o.openCard,{card_list:d},a)},chooseWXPay:function(a){c(o.chooseWXPay,f(a),a)}},b&&(a.wx=a.jWeixin=C),C});

    <script type="text/javascript">
        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: '{$signPackage['appId']}', // 必填，公众号的唯一标识
            timestamp: '{$signPackage['timestamp']}', // 必填，生成签名的时间戳
            nonceStr: '{$signPackage['nonceStr']}', // 必填，生成签名的随机串
            signature: '{$signPackage['signature']}',// 必填，签名，见附录1
            jsApiList: [
                // 所有要调用的 API 都要加到这个列表中
                'onMenuShareTimeline',
                'onMenuShareAppMessage',
                'hideMenuItems',
            ] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
        });

        wx.ready(function () {
            wx.hideMenuItems({
                menuList: ['menuItem:share:qq','menuItem:openWithSafari','menuItem:copyUrl']
            });
　　　　　　　　//这里就是后台渲染过来的内容，也可以在这里填写。
            var shareData = {
                title: '{$invite['Title']}',
                desc: '{$invite['Description']}',
                link: '{$invite['Url']}',
                imgUrl: '{$invite['PicUrl']}',
                success: function (res) {
                // 用户确认分享后执行的回调函数
                }
            };
            wx.onMenuShareAppMessage(shareData);
            wx.onMenuShareTimeline(shareData);
        });
    </script>

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