用thinkphp进行微信开发的整体设计思考

因为项目中很多地方都涉及到微信接口的调用 比如很多前台模块需要用到 后台模块也有少许调用 其他模块也可能会需要调用  为了让他们都能很方便的直接调用 我把他们独立成为一个模块 这个模块包含了基础的微信接口和微信jssdk

具体的设计请参考下面  当然如果有更好的建议可以共同交流 

我先建立了一个新的模块叫Weixin 并在其下面建立了控制器BaseController 也就是一个微信类

这个微信基类 我是这样定义的

<?php 
/**
 *微信开发的公共类（不含支付 如需要可自行加入）
 *
 */
namespace WeixinController;
use ThinkController;
use ComWechatAuth;   
use ComJssdk;       
class  BaseController extends Controller {
    public $appId;
    public $appSecret; 
    public $WechatAuth;
    public $jssdk;
    public function _initialize(){
        $config = F('DB_CONFIG_DATA');   //获取配置信息
        if(!$config){
            $config = api('Config/lists');
            F('DB_CONFIG_DATA',$config);
        }
        C($config); //添加配置
        $this->appId = C('WEIXIN_CONFIG.appId');    
        $this->appSecret = C('WEIXIN_CONFIG.appSecret');
        $this->WechatAuth =  new WechatAuth($this->appId,$this->appSecret);
        $this->jssdk = new Jssdk($appId,$appSecret);   //调用微信Jssdk
        // $this->signPackage = $this->jssdk->GetSignPackage();
    }
?>

下面是我微信sdk包的部署目录结构供参考

这些部署好后 在任意模块中引入的方法是 

$Weixin = new WeixinControllerBaseController();

下面我用实例来讲述如何使用

1，获取用户信息（不管微信用户是否关注了公众号  下面代码大部分为注释内容 其实很少）

public function mytest () {        
        
        $Weixin = new WeixinControllerBaseController();

        $domain = C('WEB_DOMAIN');
            $request_url = $_SERVER['REQUEST_URI'];
            $redirect_url = $domain.$request_url;
          if(!isset($_GET['code'])){            
               header('Location:  https://open.weixin.qq.com/connect/oauth2/authorize?appid='.$Weixin->appId.'&redirect_uri='.$redirect_url.'&response_type=code&scope=snsapi_base&state=1/');
               exit;           
           }
            $code = $_GET['code'];       
        $access_token_arr = $Weixin->WechatAuth ->getAccessToken('code',$code);   //oauth2.0网页授权的access_token
        //$access_token_arr数据结构如下
        /* Array
        (
            [access_token] => OezXcEiiBSKSxW0eoylIeLrIQT6NoDaXZIUcW_1wOj_TwSQ_Jqp2CBj0RLBbgvBCkzyZ74E6066btMwNPj6JYaR_TPn9PH02FgR4APr7iOhihlYgosPEyDZIVJXduuvUj3ay5cVYpv_TDA3TBNvLiA
            [expires_in] => 7200
            [refresh_token] => OezXcEiiBSKSxW0eoylIeLrIQT6NoDaXZIUcW_1wOj_TwSQ_Jqp2CBj0RLBbgvBCzJ6lw18Bb-cy9yUp2Tojmp48u_95jVHl1WTODEM0Z3yAPY8sORIlF0Gw8_99eEXsCagdc29djCjEWv2TovkPig
            [openid] => o0r2njtFSolnsaBoVP5MxjhNjUlg
            [scope] => snsapi_base
        )*/
        $globals_access_token = $Weixin->WechatAuth->getAccessToken();    //全局access_token

        $userInfo = $Weixin->WechatAuth->userInfo($access_token_arr['openid']); //通过全局access_token获取用户基本信息 未关注是array('subscribe'=>0,'openid')

        if(!$userInfo['subscribe']){ //用户未关注  只能通过网页授权api获取用户信息
            $data = array();
            $data['access_token'] = $access_token_arr['access_token'];
                        $data['openid'] = $access_token_arr['openid'];
                        $userinfo = $Weixin->WechatAuth->getUserInfo($data); 
                        p($userinfo);//打印信息
                        /*
                Array(
                    [openid] => o0r2njtFSolnsaBoVP5MxjhNjUlg
                    [nickname] => 呼啦啦
                    [sex] => 1
                    [language] => zh_CN
                    [city] => 
                    [province] => 
                    [country] => 赞比亚
                    [headimgurl] => http://wx.qlogo.cn/mmopen/rBgkzASpGRQLPXPDlEGmPoHl35qjwaA8s4WfOncETZm7kDGEVicEJZORzO73m7ib9Av7AK7icLrfl1nmhxGsglmzJRcnryNPy6T/0
                    [privilege] => Array
                        (
                        )

                )
            */


        }else{  //关注了公众号 直接返回用户信息

            p($userInfo);  //打印信息
            /*
                Array(
                    [subscribe] => 1
                    [openid] => o0r2njtFSolnsaBoVP5MxjhNjUlg
                    [nickname] => 呼啦啦
                    [sex] => 1
                    [language] => zh_CN
                    [city] => 
                    [province] => 
                    [country] => 赞比亚
                    [headimgurl] => http://wx.qlogo.cn/mmopen/rBgkzASpGRQLPXPDlEGmPoHl35qjwaA8s4WfOncETZm7kDGEVicEJZORzO73m7ib9Av7AK7icLrfl1nmhxGsglmzJRcnryNPy6T/0
                    [subscribe_time] => 1427793013
                    [remark] => 
                )
            */

        }
        

    }

由于微信开发自身机制的原因，在这里要说明的是，thinkphp官方给的wechatAuth包 中并没有对access_token进行缓存，还需要进行适当修改 下面仅以wechatAuth.class.php文件修改为例说明 （网页授权的token， jssdk中的ticket 也要做类似如下的缓存，在此就不一一说明了）

 /**
     * 构造方法，调用微信高级接口时实例化SDK
     * @param string $appid  微信appid
     * @param string $secret 微信appsecret
     * @param string $token  获取到的access_token
     */
    public function __construct($appid, $secret, $token = null){
        if($appid && $secret){
            $this->appId     = $appid;
            $this->appSecret = $secret;
            if(!empty($token)){
                $this->accessToken = $token;
            }else{
                $this->getAccessToken();
            }
        } else {
            throw new Exception('参数错误！');
        }
    }


     /**
     * 获取access_token，用于后续接口访问
     * @return array access_token信息，包含 token 和有效期
     */
    public function getAccessToken($type = 'client', $code = null){
       
             $param = array(
                     'appid'  => $this->appId,
                     'secret' => $this->appSecret
                );

            switch ($type) {
                case 'client':
                    if(S('globals_access_token')){
                        $this->accessToken = S('globals_access_token');
                        return S('globals_access_token');
                        break;
                    }
                    $param['grant_type'] = 'client_credential';
                    $url = "{$this->apiURL}/token";
                    break;

                case 'code':
                    $param['code'] = $code;
                    $param['grant_type'] = 'authorization_code';
                    $url = "{$this->oauthApiURL}/oauth2/access_token";
                    break;
                
                default:
                    throw new Exception('不支持的grant_type类型');
                    break;
            }

            $token = self::http($url, $param);
            $token = json_decode($token, true);

            if(is_array($token)){
                if(isset($token['errcode'])){
                    throw new Exception($token['errmsg']);
                } else {
                    if($type == 'client'){
                        S('globals_access_token',$token['access_token'],7000);
                    }

                    $this->accessToken = $token['access_token'];
                   
                    return $token;
                }
            } else {
                throw new Exception('获取微信access_token失败！');
            }



       
    }