微信公众平台开发(99) 自定义菜单获取OpenID_PHP教程

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发布： 2016-07-13 10:26:56

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关键字微信公众平台自定义菜单 openid
作者：方倍工作室
原文：http://www.cnblogs.com/txw1958/p/weixin-menu-get-openid.html

在这篇微信公众平台开发教程中，我们将介绍如何在自定义菜单中获得用户的OpenID。

本篇开发教程的实质是微信自定义菜单及OAuth2.0授权的灵活运用。

本文分为以下四个部分：

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一、拥有高级接口权限

拥有高级接口权限时，我们使用OAuth2.0授权的方式来获取。

OAuth2.0的详细设置方法，请参考微信公众平台开发（71）OAuth2.0网页授权

在设置好授权回调页面域名之后，我们需要构造菜单，为了方便同时讲解下一小节，我们菜单构造如下

<span>{
    </span><span>"</span><span>button</span><span>"</span><span>: [
        {
            </span><span>"</span><span>type</span><span>"</span>: <span>"</span><span>click</span><span>"</span><span>,
            </span><span>"</span><span>name</span><span>"</span>: <span>"</span><span>图文获取</span><span>"</span><span>,
            </span><span>"</span><span>key</span><span>"</span>: <span>"</span><span>图文</span><span>"</span><span>
        },
        {
            </span><span>"</span><span>type</span><span>"</span>: <span>"</span><span>view</span><span>"</span><span>,
            </span><span>"</span><span>name</span><span>"</span>: <span>"</span><span>授权获取</span><span>"</span><span>,
            </span><span>"</span><span>url</span><span>"</span>: <span>"</span><span>https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx0738856156f7323c&redirect_uri=http://israel.sinaapp.com/oauth2/&response_type=code&scope=snsapi_base&state=1#wechat_redirect</span><span>"</span><span>
        }
    ]
}</span>

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这样将生成两个菜单如下

当点击授权获取的时候，将访问授权页面，页面将使用OAuth2.0的方式获得openid。

代码可以参考《微信公众平台开发最佳实践》第72页。

跳转后显示如下：

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二、没有高级接口权限

对于没有高级接口权限的账号，就不能使用view事件获得OpenID，需要使用click事件来实现

实现原理就是获得接收消息中的FromUserName值，并且在url中构造openid的参数即可

在自定义菜单中响应代码如下

<span> 1</span> <span>private</span> <span>function</span> receiveEvent(<span>$object</span><span>)
</span><span> 2</span> <span>{
</span><span> 3</span>     <span>$content</span> = ""<span>;
</span><span> 4</span>     <span>switch</span> (<span>$object</span>-><span>Event)
</span><span> 5</span> <span>    {
</span><span> 6</span>         <span>case</span> "subscribe":
<span> 7</span>             <span>$content</span>[] = <span>array</span>("Title"=>"欢迎关注方倍工作室",  "Description"=>"", "PicUrl"=>"http://discuz.comli.com/weixin/weather/icon/cartoon.jpg", "Url" =>"http://m.cnblogs.com/?u=txw1958"<span>);
</span><span> 8</span>             <span>break</span><span>;
</span><span> 9</span>         <span>case</span> "CLICK":
<span>10</span>             <span>switch</span> (<span>$object</span>-><span>EventKey)
</span><span>11</span> <span>            {
</span><span>12</span>                 <span>case</span> "图文":
<span>13</span>                     <span>$content</span>[] = <span>array</span>("Title"=>"OpenID", "Description"=>"你的OpenID为：".<span>$object</span>->FromUserName, "PicUrl"=>"", "Url" =>"http://m.cnblogs.com/?u=txw1958&openid=".<span>$object</span>-><span>FromUserName);
</span><span>14</span>                     <span>break</span><span>;
</span><span>15</span> <span>            }
</span><span>16</span>             <span>break</span><span>;
</span><span>17</span> <span>    }
</span><span>18</span>     <span>if</span>(<span>is_array</span>(<span>$content</span><span>)){
</span><span>19</span>         <span>$result</span> = <span>$this</span>->transmitNews(<span>$object</span>, <span>$content</span><span>);
</span><span>20</span>     }<span>else</span><span>{
</span><span>21</span>         <span>$result</span> = <span>$this</span>->transmitText(<span>$object</span>, <span>$content</span><span>);
</span><span>22</span> <span>    }
</span><span>23</span>     <span>return</span> <span>$result</span><span>;
</span><span>24</span> }

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运行后效果如下所示。