1.必须是认证过的公众号才能有分享的权限(认证300元/次)

2.在公众平台获取AppID(应用ID)AppSecret(应用密钥) 开发 > 基本配置

3.在公众平台绑定域名 流程:公众号设置 > 功能设置 > JS接口安全域名 > 设置(每月只能设置3次)

4.在开发文档最下方下载demo http://demo.open.weixin.qq.com/jssdk/sample.zip

5.修改sample.php中的AppIDAppSecret上传到第3步绑定域名对应的服务器

6.demo给的代码js部分比较臃肿,稍微整理了一下

// js部分整理了一下
wx.config({
    debug: <?php if(isset($_GET['is_weixin'])){echo 'true';}else{echo 'false';}?>,
    appId: '<?php echo $signPackage["appId"];?>',
    timestamp: <?php echo $signPackage["timestamp"];?>,
    nonceStr: '<?php echo $signPackage["nonceStr"];?>',
    signature: '<?php echo $signPackage["signature"];?>',
    jsApiList: ['onMenuShareTimeline','onMenuShareAppMessage','onMenuShareQQ']
});

wx.checkJsApi({
    jsApiList: ['onMenuShareTimeline','onMenuShareAppMessage','onMenuShareQQ'],
    success: function(res) {},error:function(res){}
});

wx.ready(function () {
    var title = '我的标题';
    var desc = '<?=config_item('share_p2p')?>';
    var link = '<?=$share_url?>';
    var imgUrl = 'https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png';
    // 发送给朋友
    wx.onMenuShareAppMessage({title:title, desc:desc, link:link, imgUrl:imgUrl});
    // 分享到朋友圈
    wx.onMenuShareTimeline({title:title, desc:desc, link:link, imgUrl:imgUrl});
    // 分享到QQ
    wx.onMenuShareQQ({title:title, desc:desc, link:link, imgUrl:imgUrl});
})

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