微信小程序怎么获取用户手机号完整代码

微信小程序获取用户手机号需要前端进行授权，后端需要进行解密。以下是完整代码：

前端代码：

wx.login({
  success: function (res) {
    if (res.code) {
      wx.request({
        url: 'https://yourdomain.com/onLogin',
        data: {
          code: res.code
        },
        success: function (res) {
          if (res.data.code === 0) {
            wx.setStorageSync('token', res.data.data.token);
            wx.getUserInfo({
              success: function (res) {
                wx.request({
                  url: 'https://yourdomain.com/onGetUserInfo',
                  data: {
                    encryptedData: res.encryptedData,
                    iv: res.iv
                  },
                  header: {
                    'Authorization': 'Bearer ' + res.data.data.token
                  },
                  success: function (res) {
                    console.log(res.data);
                  }
                })
              }
            })
          } else {
            console.log('登录失败！' + res.errMsg)
          }
        }
      })
    } else {
      console.log('获取用户登录态失败！' + res.errMsg)
    }
  }
})

后端代码：

<?php
namespace app\api\controller;

use think\Controller;
use think\Request;
use app\api\model\User as UserModel;
use app\api\service\Token as TokenService;
use app\api\service\WxUser as WxUserService;

class User extends Controller
{
    public function login()
    {
        $code = input('post.code');
        $wxUser = new WxUserService($code);
        $openid = $wxUser->getOpenId();
        $user = UserModel::getByOpenId($openid);
        if (!user) {
            $user = UserModel::create([
                'openid' => $openid
            ]);
        }
        $token = TokenService::generateToken();
        TokenService::saveToCache($token, $user->id);
        return [
            'code' => 0,
            'data' => [
                'token' => $token
            ]
        ];
    }

    public function getUserInfo()
    {
        $encryptedData = input('post.encryptedData');
        $iv = input('post.iv');
        $token = TokenService::getCurrentToken();
        $uid = TokenService::getUidByToken($token);
        $user = UserModel::get($uid);
        $wxUser = new WxUserService();
        $wxUser->setSessionKey($user->session_key);
        $wxUserInfo = $wxUser->getUserInfo($encryptedData, $iv);
        $user->saveUserInfo($wxUserInfo);
        return [
            'code' => 0,
            'data' => $wxUserInfo
        ];
    }

    public function getPhoneNumber()
    {
        $encryptedData = input('post.encryptedData');
        $iv = input('post.iv');
        $token = TokenService::getCurrentToken();
        $uid = TokenService::getUidByToken($token);
        $user = UserModel::get($uid);
        $wxUser = new WxUserService();
        $wxUser->setSessionKey($user->session_key);
        $phoneNumber = $wxUser->getPhoneNumber($encryptedData, $iv);
        $user->savePhoneNumber($phoneNumber);
        return [
            'code' => 0,
            'data' => $phoneNumber
        ];
    }
}

其中，WxUserService是一个封装了微信小程序登录和解密的服务类，UserModel是一个用户模型类，TokenService是一个封装了Token生成和验证的服务类。