微信小程序如何使用PHP语言获取数据？在小程序后台配置好相应的后端请求地址，路径是：开发—->开发设置

成都小程序开发如果需要做多个小程序的打通，还需要在微信开放平台绑定到开发者账号下面， 如果不需要union_id请忽略

服务端准备一个用户授权的接口，假设接口链接为http://test.dev.com/user/authorization，此接口接受如下参数

code：微信登陆接口返回的登陆凭证，用户获取session_key
iv：微信小程序登陆接口返回的向量，用于数据解密
encrypted_data : 微信获取用户信息接口的返回的用户加密数据，用于后端的接口解析
signature加密数据
接口返回的数据如下

{
“errcode”: 200,
“msg”: “SUCCESS”,
“data”: {
“uid”: 34098,
“unionid”: “xxx”,
}
}
6.建表
1）用户表，其中比较重要的字段是union_id，因为我们是有多个小程序和公众号，因此使用这个来区分唯一的用户编号

DROP TABLE IF EXISTS `jz_wxa_user`;
CREATE TABLE `jz_wxa_user` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`uid` bigint(18) DEFAULT NULL,
`openid` varchar(255) CHARACTER SET utf8 DEFAULT NULL COMMENT \’openid\’,
`user_name` varchar(100) CHARACTER SET utf8mb4 DEFAULT \’\’,
`nick_name` varchar(100) COLLATE utf8mb4_unicode_ci DEFAULT \’\’ COMMENT \’用户昵称\’,
`sex` enum(\’0\’,\’1\’) CHARACTER SET utf8 DEFAULT \’1\’ COMMENT \’性别\’,
`avatar` varchar(255) CHARACTER SET utf8 DEFAULT NULL COMMENT \’用户头像\’,
`province` varchar(100) CHARACTER SET utf8 DEFAULT NULL COMMENT \’省份\’,
`city` varchar(100) CHARACTER SET utf8 DEFAULT NULL COMMENT \’城市\’,
`country` varchar(100) CHARACTER SET utf8 DEFAULT NULL COMMENT \’国家\’,
`wx_union_id` varchar(255) CHARACTER SET utf8 DEFAULT NULL COMMENT \’公众平台的唯一id\’,
`from_url` varchar(255) CHARACTER SET utf8 DEFAULT NULL COMMENT \’来源url\’,
`created_at` timestamp NULL DEFAULT NULL,
`updated_at` timestamp NULL DEFAULT NULL,
`from_appid` varchar(30) COLLATE utf8mb4_unicode_ci DEFAULT \’wx95fc895bebd3743b\’ COMMENT \’来源appid\’,
`wx_header` varchar(150) COLLATE utf8mb4_unicode_ci DEFAULT \’\’ COMMENT \’微信头像\’,
`gh_openid` varchar(60) COLLATE utf8mb4_unicode_ci DEFAULT \’\’ COMMENT \’微信公众号openid\’,
`phone` varchar(30) CHARACTER SET utf8 DEFAULT \’\’ COMMENT \’手机号码\’,
PRIMARY KEY (`id`),
KEY `idx_uid_union_id` (`uid`,`wx_union_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
实现步骤

用户授权时序图

关键代码

小程序端

小程序端的获取用户信息流程

1）调用login方法获取code
2）调用getUserInfo方法获取用户的加密数据
3）调用后端的用户授权接口将用户信息保存到服务端
4）保存后端接口返回的uid和unionid到localstorage中，作为全局参数

获取用户的授权信息

getUid:function(cf){
var that = this
wx.login({
success: function (ress) {
var code = ress.code
wx.getUserInfo({
withCredentials: true,
success: function (res) {
that.globalData.userInfo = res.userInfo;
that.authorize(code, res.signature, res.iv, res.rawData, res.encryptedData, cf)
}
})
}
})
},
authorize: function (code, signature, iv, rawData, encryptedData, cf) {
var that =this
var dataobj = {
code: code,
signature: signature,
iv: iv,
raw_data: rawData,
encrypted_data: encryptedData
}
console.log(“code:”,code)
var param = JSON.stringify(dataobj)
param = that.Encrypt(param)
var url = that.data.API_DOMAIN2 + “/user/authorization?param=” + param
wx.request({
url: url,
method: “GET”,
header: {
\’content-type\’: \’application/json\’
},
success: function (res) {
if (res.data.errcode == 200) {
wx.hideToast()
wx.setStorage({
key: “uid”,
data: res.data.data.uid,
success: function () {
if (cf) {
typeof cf == “function” && cf(res.data.data.uid)
}
}
})
} else {
that.exceptionHandle(\’uid\’, url, res.data.errcode, res.data.msg)
}
}
})
},
服务端

入口方法

/**
* api接口开发
* 获取详情的接口
* @param $uid 用户编号
* @param $iv 向量
* @param $encryptedData 微信加密的数据
* @param $rawData 判断是否为今天
* @param $signature 签名
* @return array
*/
public static function authorization($appid,$appsecret,$code,$iv,$encryptedData,$rawData,$signature){
$result = self::decodeWxData($appid,$appsecret,$code,$iv,$encryptedData);
if($result[\’errcode\’] != 200){
return $result;
}
//处理微信授权的逻辑
$wxUserData = $result[\’data\’];
error_log(“authorization data=============>”);
error_log(json_encode($wxUserData));
$uid = WxaUserService::regWxaUser($wxUserData);
$data[\’uid\’] = $uid[\’uid\’];
$data[\’unionid\’] = $uid[\’unionid\’];
$result[\’data\’] = $data;
return $result;
}

/**
* 解密微信的数据
* @param $code wx.login接口返回的code
* @param $iv wx.getUserInfo接口或者wx.getWeRunData返回的iv
* @param $encryptedData wx.getUserInfo接口或者wx.getWeRunData返回的加密数据
* @return array
*/
public static function decodeWxData($appid,$appsecret,$code,$iv,$encryptedData){
$sessionKeyUrl = sprintf(\’%s?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code\’,config(\’param.wxa_user_info_session_key_url\’),$appid,$appsecret,$code);
$rtnJson = curlRequest($sessionKeyUrl);
$data = json_decode($rtnJson,true);
error_log(\’authorization wx return data========>\’);
error_log($rtnJson);
if(isset($data[\’errcode\’])){
return $data;
}
$sessionKey = $data[\’session_key\’];
$wxHelper = new WxBizDataHelper($appid,$sessionKey,$encryptedData,$iv);
$data[\’errcode\’] = 200;
$data[\’data\’] = [];
if(!$wxData = $wxHelper->getData()){
$data[\’errcode\’] = -1;
}else{
error_log(\’current wx return data is =========>\’.json_encode($wxData));
$data[\’data\’] = $wxData;
}
return $data;
}
保存用户信息的方法

/**
* 保存用户信息的方法
* @param $wxaUserData
* @param $regFromGh 表示是否从公众号进行注册
*/
public function regWxaUser($wxaUserData,$regFromGh = false)
{
$value = $wxaUserData[\’unionId\’];
$key = getCacheKey(\’redis_key.cache_key.zset_list.lock\’) . $value;
$newExpire = RedisHelper::getLock($key);
$data = $this->storeWxaUser($wxaUserData,$regFromGh);
RedisHelper::releaseLock($key, $newExpire);
return $data;
}

/**
* 保存信息
* @param $wxaUserData
* @return mixed
*/
public function storeWxaUser($wxaUserData,$regFromGh = false)
{
$wxUnionId = $wxaUserData[\’unionId\’];
if (!$user = $this->getByWxUnionId($wxUnionId)) {
$getAccountDataStartTime = time();
//这里是因为需要统一账户获取uid，所以这个是用户中心的接口，如果没有这个流程，则直接使用数据
if($accountData = AccountCenterHelper::regWxaUser($wxaUserData)){
$getAccountDataEndTime = time();
$accountRegTime = $getAccountDataEndTime – $getAccountDataStartTime;
error_log(“reg user spend time is ===================>” . $accountRegTime);
$user = [
\’uid\’ => $accountData[\’uid\’],
\’user_name\’ => $accountData[\’user_name\’],
\’nick_name\’ => $wxaUserData[\’nickName\’],
\’sex\’ => $accountData[\’sex\’],
\’wx_union_id\’ => $accountData[\’wx_union_id\’],
\’avatar\’ => isset($accountData[\’avatar\’])?$accountData[\’avatar\’]:””,
\’from_appid\’ => $accountData[\’from_appid\’],
\’province\’ => $wxaUserData[\’province\’],
\’city\’ => $wxaUserData[\’city\’],
\’country\’ => $wxaUserData[\’country\’],
\’openid\’ => $wxaUserData[\’openId\’],
\’wx_header\’ => isset($wxaUserData[\’avatarUrl\’])?$wxaUserData[\’avatarUrl\’]:””,
\’gh_openid\’ => $regFromGh?$wxaUserData[\’openId\’]:””,
];
error_log(“insert data=============>” . json_encode($user));
$user = $this->store($user);
$regApiUserEndTime = time();
error_log(” reg api user spend time================>” . ($regApiUserEndTime – $getAccountDataEndTime));
error_log(” after insert data=============>” . json_encode($user));
}
}else{
if(!$user[\’wx_header\’]){
$updateData = [
\’id\’ => $user[\’id\’],
\’uid\’ => $user[\’uid\’],
\’wx_header\’ => $wxaUserData[\’avatarUrl\’],
];
$this->update($updateData);
}
//同步用户的openid
if($wxaUserData[\’openId\’] != $user[\’openid\’]){
$updateData = [
\’id\’ => $user[\’id\’],
\’uid\’ => $user[\’uid\’],
\’openid\’ => $wxaUserData[\’openId\’],
];
$this->update($updateData);
}
}
$data[\’uid\’] = $user[\’uid\’];
$data[\’unionid\’] = $wxUnionId;
return $data;
}
根据unionid获取用户信息

/**
* 根据unionid获取用户信息
*/
public function getByWxUnionId($unionId)
{
$cacheKey = getCacheKey(\’redis_key.cache_key.wxa_user.info\’) . $unionId;
$value = $this->remember($cacheKey, function () use ($unionId) {
$userInfo = WxaUser::where(\’wx_union_id\’, $unionId)->first();
$userInfo = $this->compactUserInfo($userInfo);
return $userInfo;
});
return $value;
}
WxBizDataHelper工具类

<?php
/**
* Created by PhpStorm.
* User: Auser
* Time: 11:17
*/

namespace App\Http\Base\Wx;

class WxBizDataHelper
{

private $appid;
private $seesionKey ;
private $encryptedData;
private $iv;
public function __construct($appid, $sessionKey,$encryptedData, $iv)
{
$this->appid = $appid;
$this->seesionKey = $sessionKey;
$this->encryptedData = $encryptedData;
$this->iv = $iv;
}

public function getData(){
$pc = new WXBizDataCrypt($this->appid, $this->seesionKey);
$json = \’\’;
$errCode = $pc->decryptData($this->encryptedData, $this->iv, $json);
$data = [];
if ($errCode == 0) {
$data = json_decode($json,true);
}
return $data;
}

}
WXBizDataCrypt工具类

<?php
/**
* Created by PhpStorm.
* User: Auser
* Time: 10:38
*/

namespace App\Http\Base\Wx;

use App\Http\Base\Wx\Prpcrypt;
use App\Http\Base\Wx\ErrorCode;
use App\Http\Base\Wx\PKCS7Encoder;
class WXBizDataCrypt
{

private $appid;
private $sessionKey;

/**
* 构造函数
* @param $sessionKey string 用户在小程序登录后获取的会话密钥
* @param $appid string 小程序的appid
*/
public function __construct( $appid, $sessionKey)
{
$this->sessionKey = $sessionKey;
$this->appid = $appid;
}

/**
* 检验数据的真实性，并且获取解密后的明文.
* @param $encryptedData string 加密的用户数据
* @param $iv string 与用户数据一同返回的初始向量
* @param $data string 解密后的原文
*
* @return int 成功0，失败返回对应的错误码
*/
public function decryptData( $encryptedData, $iv, &$data )
{
if (strlen($this->sessionKey) != 24) {
return ErrorCode::$IllegalAesKey;
}
$aesKey=base64_decode($this->sessionKey);

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

$aesCipher=base64_decode($encryptedData);

$pc = new Prpcrypt($aesKey);
$result = $pc->decrypt($aesCipher,$aesIV);

if ($result[0] != 0) {
return $result[0];
}

$dataObj=json_decode( $result[1] );
if( $dataObj == NULL )
{
return ErrorCode::$IllegalBuffer;
}
if( $dataObj->watermark->appid != $this->appid )
{
return ErrorCode::$IllegalBuffer;
}
$data = $result[1];
return ErrorCode::$OK;
}

}
Prpcrypt工具类

<?php
/**
* Created by PhpStorm.
* User: Auser
* Time: 10:55
*/

namespace App\Http\Base\Wx;

class Prpcrypt
{
public $key;

public function __construct($key)
{
$this->key = $key;
}

/**
* 对密文进行解密
* @param string $aesCipher 需要解密的密文
* @param string $aesIV 解密的初始向量
* @return string 解密得到的明文
*/
public function decrypt($aesCipher, $aesIV)
{

try {
$module = mcrypt_module_open(MCRYPT_RIJNDAEL_128, \’\’, MCRYPT_MODE_CBC, \’\’);
mcrypt_generic_init($module, $this->key, $aesIV);
//解密
$decrypted = mdecrypt_generic($module, $aesCipher);
mcrypt_generic_deinit($module);
mcrypt_module_close($module);
} catch (Exception $e) {
return array(ErrorCode::$IllegalBuffer, null);
}

try {
$result = PKCS7Encoder2::decode($decrypted);
} catch (Exception $e) {
//print $e;
return array(ErrorCode::$IllegalBuffer, null);
}
return array(0, $result);
}
}
ErrorCode状态代码类

<?php
/**
* Created by PhpStorm.
* User: Auser
* Time: 10:33
*/

namespace App\Http\Base\Wx;

class ErrorCode
{
public static $OK = 0;
public static $IllegalAesKey = -41001;
public static $IllegalIv = -41002;
public static $IllegalBuffer = -41003;
public static $DecodeBase64Error = -41004;

}