微信小程序登陆 获取手机号 获取头像 open_id session_key

/**
     * 会员登录
     * @ApiMethod (POST)
     * @ApiParams (name="code", type="string", required=true, description="code")
     * @ApiReturn   ({ "code": 1,"msg": "登录成功", "time": "1562726766"})
     * @ApiParams (name="encryptedData", type="string", required=true, description="encryptedData")
     * @ApiParams (name="iv", type="string", required=true, description="iv")
     * @ApiParams (name="invite_code", type="string", required=true, description="invite_code")
     * @ApiParams (name="username", type="string", required=true, description="username")
     * @ApiParams (name="avatarUrl", type="string", required=true, description="avatarUrl")
     */

    public function login(){
        $APPID = 'wx*********'; 
        $AppSecret = 'e1cd0a3**********c0f22f6582f';
        $code = $this->request->request('code');
        $encryptedData = $this->request->request('encryptedData');
        $invite_code = $this->request->request('invite_code');//邀请码（不重要）
        $iv = $this->request->request('iv');
        $username = $this->request->request('username');//（微信名字）
        $username = filterEmoji($username);//微信名字特殊符号处理
        $avatarUrl = $this->request->request('avatarUrl');//微信头像
        //头像处理
        $path = file_get_contents($avatarUrl);
        $name = md5(rand(0,9999)).'.'.'png';
        // 微信头像存入数据库中
        file_put_contents('./uploads/avatar/'.$name,$path);
        if (empty($invite_code)){
            $invite_code = '';
        }
        if (empty($code) || empty($encryptedData) || empty($iv) || empty($username) || empty($avatarUrl)){
            $this->error('缺少参数');
        }
        $url='https://api.weixin.qq.com/sns/jscode2session?appid='.$APPID.'&secret='.$AppSecret.'&js_code='.$code.'&grant_type=authorization_code';
        $html = file_get_contents($url);
        $jsondecode = json_decode($html, true);
        $array = $jsondecode;
        $session_key = isset( $array['session_key'] ) ? $array['session_key'] : '';
        //根据session_key,encryptedData,iv 解析字符串，获取信息
        if($encryptedData && $iv){
            // decryptData 解密方法
            $errCode = decryptData( $APPID, $session_key,$encryptedData, $iv, $stepData );
            if ($errCode == 0) {   //解析成功，更新数据
                $stepData = json_decode($stepData, true);
                // 获取手机号
                $phone = $stepData['phoneNumber'];
            }
        }

        $openid = Db::name('user')->where('openid',$array['openid'])->find();
        //判断数据空中是否与openid，如果有就是登陆，顺便更新一下数据库中的session_key字段
        //session_key和open_id都在array中获得
        //所有参数都获取到了，就可以写下边的逻辑了
                
      

    }

上边登陆中用到的方法  微信名字特殊符号处理（filterEmoji）

微信名字特殊符号处理
function filterEmoji($str)
{
    $str = preg_replace_callback(
        '/./u',
        function (array $match) {
            return strlen($match[0]) >= 4 ? '' : $match[0];
        },
        $str);

    return $str;
}

根据session_key,encryptedData,iv 解析字符串，获取信息获取手机号（decryptData）

//解密
function decryptData( $appid, $sessionKey, $encryptedData, $iv, &$data )
{
    $OK = 0;
    $IllegalAesKey = -41001;
    $IllegalIv = -41002;
    $IllegalBuffer = -41003;
    $DecodeBase64Error = -41004;

    if (strlen($sessionKey) != 24) {
        return $IllegalAesKey;
    }

    $aesKey=base64_decode($sessionKey);


    if (strlen($iv) != 24) {
        return $IllegalIv;
    }
    $aesIV=base64_decode($iv);

    $aesCipher=base64_decode($encryptedData);
//var_dump($aesKey,$aesIV,$aesCipher);

    $result=openssl_decrypt( $aesCipher, "AES-128-CBC", $aesKey, 1, $aesIV);

    $dataObj=json_decode( $result );

    if( $dataObj  == NULL )
    {
        return $IllegalBuffer;
    }
    if( $dataObj->watermark->appid != $appid )
    {
        return $IllegalBuffer;
    }
    $data = $result;
    return $OK;
}

下一篇文章是小程序生成二维码。