微信oAuth授权返回处理

　　 $wechat_accesstoken = $wechat_domain."oauth2/access_token?appid=".APPID."&secret=".SECRET."&code=".$code."&grant_type=authorization_code";
    $r = httpsget($wechat_accesstoken);
    $a = json_decode($r,true);
    $accesstoken = $a[‘access_token‘];
    //$refresh_token = $a[‘refresh_token‘];
    $openid = $a[‘openid‘];
    //拉取用户信息
    $wechat_user = $wechat_domain."userinfo?access_token=".$accesstoken."&openid=".$openid."&lang=zh_CN";
    $r = httpsget($wechat_user);
    $a = json_decode($r,true);
　　 //a 的内容如下
    $a = array(
        ‘nickname‘=>$a[‘nickname‘],
        ‘sex‘=>$a[‘sex‘],
        ‘province‘=>$a[‘province‘],
        ‘city‘=>$a[‘city‘],
        ‘country‘=>$a[‘country‘],
        ‘headimgurl‘=>$a[‘headimgurl‘],
        ‘privilege‘=>json_encode($a[‘privilege‘]),
        ‘unionid‘=>$a[‘unionid‘]
    );