php CI 微信支付扩展 微信扫码支付 jssdk 支付 退款

2018-02-24 10:32:01来源:oschina作者:bug_lm人点击

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微信支付API类库来自:https://github.com/zhangv/wechat-pay


请先看一眼官方场景及支付时序图:https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=6_5


官方API列表:https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=9_1


二维码生成类库:phpqrcode


直接上代码


_**扫码支付篇

**_


class WechatPay {
const TRADETYPE_JSAPI = 'JSAPI',TRADETYPE_NATIVE = 'NATIVE',TRADETYPE_APP = 'APP';
const URL_UNIFIEDORDER = "https://api.mch.weixin.qq.com/pay/unifiedorder";
const URL_ORDERQUERY = "https://api.mch.weixin.qq.com/pay/orderquery";
const URL_CLOSEORDER = 'https://api.mch.weixin.qq.com/pay/closeorder';
const URL_REFUND = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
const URL_REFUNDQUERY = 'https://api.mch.weixin.qq.com/pay/refundquery';
const URL_DOWNLOADBILL = 'https://api.mch.weixin.qq.com/pay/downloadbill';
const URL_REPORT = 'https://api.mch.weixin.qq.com/payitil/report';
const URL_SHORTURL = 'https://api.mch.weixin.qq.com/tools/shorturl';
const URL_MICROPAY = 'https://api.mch.weixin.qq.com/pay/micropay';
/**
* 错误信息
*/
public $error = null;
/**
* 错误信息XML
*/
public $errorXML = null;
/**
* 微信支付配置数组
* appid 公众账号appid
* mch_id商户号
* apikey加密key
* appsecret公众号appsecret
* sslcertPath证书路径(apiclient_cert.pem)
* sslkeyPath 密钥路径(apiclient_key.pem)
*/
private $_config;
/**
* @param $config 微信支付配置数组
*/
public function __construct($config) {
$this->_config = $config;
}
/**
* JSAPI获取prepay_id
* @param $body
* @param $out_trade_no
* @param $total_fee
* @param $notify_url
* @param $openid
* @return null
*/
public function getPrepayId($body,$out_trade_no,$total_fee,$notify_url,$openid) {
$data = array();
$data["nonce_str"]= $this->get_nonce_string();
$data["body"]= $body;
$data["out_trade_no"] = $out_trade_no;
$data["total_fee"]= $total_fee;
$data["spbill_create_ip"] = $_SERVER["REMOTE_ADDR"];
$data["notify_url"] = $notify_url;
$data["trade_type"] = self::TRADETYPE_JSAPI;
$data["openid"] = $openid;
$result = $this->unifiedOrder($data);
if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") {
return $result["prepay_id"];
} else {
$this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"];
$this->errorXML = $this->array2xml($result);
return null;
}
}
private function get_nonce_string() {
return substr(str_shuffle("abcdefghijklmnopqrstuvwxyz0123456789"),0,32);
}
/**
* 统一下单接口
*/
public function unifiedOrder($params) {
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["device_info"] = (isset($params['device_info'])&&trim($params['device_info'])!='')?$params['device_info']:null;
$data["nonce_str"] = $this->get_nonce_string();
$data["body"] = $params['body'];
$data["detail"] = isset($params['detail'])?$params['detail']:null;//optional
$data["attach"] = isset($params['attach'])?$params['attach']:null;//optional
$data["out_trade_no"] = isset($params['out_trade_no'])?$params['out_trade_no']:null;
$data["fee_type"] = isset($params['fee_type'])?$params['fee_type']:'CNY';
$data["total_fee"]= $params['total_fee'];
$data["spbill_create_ip"] = $params['spbill_create_ip'];
$data["time_start"] = isset($params['time_start'])?$params['time_start']:null;//optional
$data["time_expire"] = isset($params['time_expire'])?$params['time_expire']:null;//optional
$data["goods_tag"] = isset($params['goods_tag'])?$params['goods_tag']:null;
$data["notify_url"] = $params['notify_url'];
$data["trade_type"] = $params['trade_type'];
$data["product_id"] = isset($params['product_id'])?$params['product_id']:null;//required when trade_type = NATIVE
$data["openid"] = isset($params['openid'])?$params['openid']:null;//required when trade_type = JSAPI
$result = $this->post(self::URL_UNIFIEDORDER, $data);
return $result;
}
private function post($url, $data,$cert = false) {
$data["sign"] = $this->sign($data);
$xml = $this->array2xml($data);
$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, $url);
if($cert == true){
//使用证书:cert 与 key 分别属于两个.pem文件
curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
curl_setopt($ch,CURLOPT_SSLCERT, $this->_config['sslcertPath']);
curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
curl_setopt($ch,CURLOPT_SSLKEY, $this->_config['sslkeyPath']);
}
$content = curl_exec($ch);
$array = $this->xml2array($content);
return $array;
}
/**
* 数据签名
* @param $data
* @return string
*/
private function sign($data) {
ksort($data);
$string1 = "";
foreach ($data as $k => $v) {
if ($v && trim($v)!='') {
$string1 .= "$k=$v&";
}
}
$stringSignTemp = $string1 . "key=" . $this->_config["apikey"];
$sign = strtoupper(md5($stringSignTemp));
return $sign;
}
private function array2xml($array) {
$xml = "" . PHP_EOL;
foreach ($array as $k => $v) {
if($v && trim($v)!='')
$xml .= "<$k>" . PHP_EOL;
}
$xml .= "
";
return $xml;
}
private function xml2array($xml) {
$array = array();
$tmp = null;
try{
$tmp = (array) simplexml_load_string($xml);
}catch(Exception $e){}
if($tmp && is_array($tmp)){
foreach ( $tmp as $k => $v) {
$array[$k] = (string) $v;
}
}
return $array;
}
/**
* 扫码支付(模式二)获取支付二维码
* @param $body
* @param $out_trade_no
* @param $total_fee
* @param $notify_url
* @param $product_id
* @return null
*/
public function getCodeUrl($body,$out_trade_no,$total_fee,$notify_url,$product_id){
$data = array();
$data["nonce_str"]= $this->get_nonce_string();
$data["body"]= $body;
$data["out_trade_no"] = $out_trade_no;
$data["total_fee"]= $total_fee;
$data["spbill_create_ip"] = $_SERVER["SERVER_ADDR"];
$data["notify_url"] = $notify_url;
$data["trade_type"] = self::TRADETYPE_NATIVE;
$data["product_id"] = $product_id;
$result = $this->unifiedOrder($data);
if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") {
return $result["code_url"];
} else {
$this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"];
return null;
}
}
/**
* 查询订单
* @param $transaction_id
* @param $out_trade_no
* @return array
*/
public function orderQuery($transaction_id,$out_trade_no){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["transaction_id"] = $transaction_id;
$data["out_trade_no"] = $out_trade_no;
$data["nonce_str"] = $this->get_nonce_string();
$result = $this->post(self::URL_ORDERQUERY, $data);
return $result;
}
/**
* 关闭订单
* @param $out_trade_no
* @return array
*/
public function closeOrder($out_trade_no){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["out_trade_no"] = $out_trade_no;
$data["nonce_str"] = $this->get_nonce_string();
$result = $this->post(self::URL_CLOSEORDER, $data);
return $result;
}
/**
* 申请退款 - 使用商户订单号
* @param $out_trade_no 商户订单号
* @param $out_refund_no 退款单号
* @param $total_fee 总金额(单位:分)
* @param $refund_fee 退款金额(单位:分)
* @param $op_user_id 操作员账号
* @return array
*/
public function refund($out_trade_no,$out_refund_no,$total_fee,$refund_fee,$op_user_id){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["nonce_str"] = $this->get_nonce_string();
$data["out_trade_no"] = $out_trade_no;
$data["out_refund_no"] = $out_refund_no;
$data["total_fee"] = $total_fee;
$data["refund_fee"] = $refund_fee;
$data["op_user_id"] = $op_user_id;
$result = $this->post(self::URL_REFUND, $data,true);
return $result;
}
/**
* 申请退款 - 使用微信订单号
* @param $out_trade_no 商户订单号
* @param $out_refund_no 退款单号
* @param $total_fee 总金额(单位:分)
* @param $refund_fee 退款金额(单位:分)
* @param $op_user_id 操作员账号
* @return array
*/
public function refundByTransId($transaction_id,$out_refund_no,$total_fee,$refund_fee,$op_user_id){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["nonce_str"] = $this->get_nonce_string();
$data["transaction_id"] = $transaction_id;
$data["out_refund_no"] = $out_refund_no;
$data["total_fee"] = $total_fee;
$data["refund_fee"] = $refund_fee;
$data["op_user_id"] = $op_user_id;
$result = $this->post(self::URL_REFUND, $data,true);
return $result;
}
/**
* 下载对账单
* @param $bill_date 下载对账单的日期,格式:20140603
* @param $bill_type 类型
* @return array
*/
public function downloadBill($bill_date,$bill_type = 'ALL'){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["bill_date"] = $bill_date;
$data["bill_type"] = $bill_type;
$data["nonce_str"] = $this->get_nonce_string();
$result = $this->post(self::URL_DOWNLOADBILL, $data);
return $result;
}
/**
* 获取js支付使用的第二个参数
*/
public function get_package($prepay_id) {
$data = array();
$data["appId"] = $this->_config["appid"];
$data["timeStamp"] = time();
$data["nonceStr"]= $this->get_nonce_string();
$data["package"] = "prepay_id=$prepay_id";
$data["signType"]= "MD5";
$data["paySign"] = $this->sign($data);
return $data;
}
/**
* 获取发送到通知地址的数据(在通知地址内使用)
* @return 结果数组,如果不是微信服务器发送的数据返回null
* appid
* bank_type
* cash_fee
* fee_type
* is_subscribe
* mch_id
* nonce_str
* openid
* out_trade_no商户订单号
* result_code
* return_code
* sign
* time_end
* total_fee总金额
* trade_type
* transaction_id微信支付订单号
*/
public function get_back_data() {
$xml = file_get_contents("php://input");
$data = $this->xml2array($xml);
if ($this->validate($data)) {
return $data;
} else {
return null;
}
}
/**
* 验证数据签名
* @param $data 数据数组
* @return 数据校验结果
*/
public function validate($data) {
if (!isset($data["sign"])) {
return false;
}
$sign = $data["sign"];
unset($data["sign"]);
return $this->sign($data) == $sign;
}
/**
* 响应微信支付后台通知
* @param $return_code 返回状态码 SUCCESS/FAIL
* @param $return_msg返回信息
*/
public function response_back($return_code="SUCCESS", $return_msg=null) {
$data = array();
$data["return_code"] = $return_code;
if ($return_msg) {
$data["return_msg"] = $return_msg;
}
$xml = $this->array2xml($data);
print $xml;
}
}

一、注意:此类库集成到ci我们要改名WechatPay改为Wechatpay让他符ci类库规范,而且文件名也要改保持统一性


二、把Wechatpay.php放在application/libraries文件夹内,将证书之类的,日志文件之类的放置在和wechatpay.php同级目录下即可,当然可以随便放


三、将微信配置信息,商户号、appid、AppSecret、API key、证书位置等信息放在wxpay_config.php文件中,放在application/config目录中


wxpay_config.php代码
<?php defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Created by PhpStorm.
* User: sxq
* Date: 2016-04-20
* Time: 16:59
*/
$config['appid'] = '你的公众号appid';$config['mch_id'] = '你的商户号';$config['apikey'] = '你的APIkey';$config['appsecret'] = "你的AppSecret";$config['sslcertPath'] =APPPATH.'libraries/cert/apiclient_cert.pem';$config['sslkeyPath'] = APPPATH.'libraries/cert/apiclient_key.pem';

四、phpqrcode文件,这份文件在微信官方sdk中,使用文件有phpqrcode文件夹和qrcode.php也一同放置在application/libraries文件夹内


五、日志文件log.php,这份文件在微信官方sdk中也一同放置在application/libraries文件夹内


require_once (APPPATH.'libraries/log.php');
//初始化日志
$logHandler= new CLogFileHandler(APPPATH."logs/".date('Y-m-d').'.log');
Log::Init($logHandler, 15);
//我在控制器最顶部加了这个实例化,日志文件放在了application/logs文件夹
//调用方式:log::debug("输出信息");简单记录执行信息方便调试

六、配置信息写完后,那么在控制器里调用吧
我们首先按照常规的加载配置信息代码一样去加载微信配置信息,最后再加载三方类库wechatpay.php


$this->load->config('wxpay_config');
$wxconfig['appid']=$this->config->item('appid');
$wxconfig['mch_id']=$this->config->item('mch_id');
$wxconfig['apikey']=$this->config->item('apikey');
$wxconfig['appsecret']=$this->config->item('appsecret');
$wxconfig['sslcertPath']=$this->config->item('sslcertPath');
$wxconfig['sslkeyPath']=$this->config->item('sslkeyPath');
//由于此类库构造函数需要传参,我们初始化类库就传参数给他吧
$this->load->library('Wechatpay',$wxconfig);

 这步基础信息配置完毕,接下来我们需要构造统一下单API接口参数


$param['body']="商品名称(自行看文档具体填什么)";
$param['attach']="我有个参数要传我就穿了个id过来,这里不要有空格避免出错";
$param['detail']="我填了商品名称加订单号";
$param['out_trade_no']="商户订单号";
$param['total_fee']="金额,记得乘以100,微信支付单位默认分";//如$total_fee*100
$param["spbill_create_ip"] =$_SERVER['REMOTE_ADDR'];//客户端IP地址
$param["time_start"] = date("YmdHis");//请求开始时间
$param["time_expire"] =date("YmdHis", time() + 600);//请求超时时间
$param["goods_tag"] = urldecode($productname);//商品标签,自行填写
$param["notify_url"] = base_url()."home/wxnotify";//自行定义异步通知url
$param["trade_type"] = "NATIVE";//扫码支付模式二
$param["product_id"] = $order->productid;//正好有产品id就传了个,看文档说自己定义
//调用统一下单API接口
$result=$this->wechatpay->unifiedOrder($param);         //这里可以加日志输出,log::debug(json_encode($result));
//成功(return_code和result_code都为SUCCESS)就会返回含有带支付二维码链接的数据
if (isset($result["code_url"]) && !empty($result["code_url"])) { />            //二维码图片链接
$data['wxurl'] = $result["code_url"];
//这里传递商户订单号到扫码视图,是因为我想做跳转,根据商户号去查询订单是否支付成功,如果成功了就跳转,定时轮询微信服务器(这个谁有好的方法可以分享给我啊,表示感谢啦)
$data['orderno'] = $out_trade_no;
$this->load->view('home/pay', $data);
}
pay.php扫码视图页面代码如下
<?php if(isset($wxurl)&&!empty($wxurl)){?>










扫码支付


public function __construct()
{
parent::__construct();
$this->load->library('CI_Wechat');//由于我的项目是时刻都跟微信绑在一起,所以直接加载在构造函数里了,不用每个方法都加载了。
$this->load->library('pagination');
}

CI_Model内容大家看下上面的类库源码,还有里面如何配置的,下面我们看看如何获取openid


function oauthurl()
{
$oauth_url = $this->ci_wechat->getOauthRedirect(base_url() . 'index.php/home/oauth', 1);
header('Location: ' . $oauth_url);
exit();
}function oauth()
{
if (!isset($_GET['code'])) { //触发微信返回code码
$baseUrl = urlencode('http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'] . $_SERVER['QUERY_STRING']);
$url = $this->__CreateOauthUrlForCode($baseUrl);
Header("Location: $url");
exit();} else {
$json = $this->ci_wechat->getOauthAccessToken();
$openid = $json['openid'];
//注册用户,成功后可以抢单
//return $this->_isRegistered($_SESSION['user']['openid']);
return $openid;}
}

以上两个方法就是获取openid的,获取之后我是保存在session里的,我每个页面都判断是否获取了openid如果没有获取直接


$this->session->set_userdata('openid', $this->oauth());

这样保证一直能得到openid
2、构造JSAPI支付所需参数(统一下单的参数构造)


$this->load->model('publist');//获取订单信息
$pub = $this->publist->GetList(array('id' => $_SESSION['orderid']));
//微信支付配置的参数配置读取
$this->load->config('wxpay_config');
$wxconfig['appid']=$this->config->item('appid');
$wxconfig['mch_id']=$this->config->item('mch_id');
$wxconfig['apikey']=$this->config->item('apikey');
$wxconfig['appsecret']=$this->config->item('appsecret');
$wxconfig['sslcertPath']=$this->config->item('sslcertPath');
$wxconfig['sslkeyPath']=$this->config->item('sslkeyPath');
$this->load->library('Wechatpay',$wxconfig);
//商户交易单号
$out_trade_no = $pub->listno;
$total_fee=$pub->fee;
$openid=$_SESSION['openid'];
$param['body']="黑人牙膏";
$param['attach']=$pub->id;
$param['detail']="黑人牙膏-".$out_trade_no;
$param['out_trade_no']=$out_trade_no;
$param['total_fee']=$total_fee*100;
$param["spbill_create_ip"] =$_SERVER['REMOTE_ADDR'];
$param["time_start"] = date("YmdHis");
$param["time_expire"] =date("YmdHis", time() + 600);
$param["goods_tag"] = "黑人牙膏";
$param["notify_url"] = base_url()."index.php/home/notify";
$param["trade_type"] = "JSAPI";
$param["openid"] = $openid;//统一下单,获取结果,结果是为了构造jsapi调用微信支付组件所需参数
$result=$this->wechatpay->unifiedOrder($param);//如果结果是成功的我们才能构造所需参数,首要判断预支付idif (isset($result["prepay_id"]) && !empty($result["prepay_id"])) {
//调用支付类里的get_package方法,得到构造的参数
$data['parameters']=json_encode($this->wechatpay->get_package($result['prepay_id']));
$data['notifyurl']=$param["notify_url"];
$data['fee']=$total_fee;
$data['pubid']=$_SESSION['orderid'];$this->load->view('home/header');
//要有个页面将以上数据传递过去并展示给用户
$this->load->view('home/pay', $data);
$this->load->view('home/footer');
}

3、支付页面,views视图pay.php


<?php
$jsApiParameters = $parameters;//参数赋值
?>

支付佣金


请认真核对佣金金额






该笔订单支付金额为<?php echo $fee; ?>元钱



以上代码可以用微信web开发者工具,使用方式自己看看吧,有了这个工具调试不再难


4、支付成功跳转页面,我们看notify方法


function notify()
{
$id = $this->uri->segment(3);
if (isset($_SESSION['openid'])) {
$this->load->model('publist');//更新业务逻辑
$rs = $this->publist->UpdateList(array('id' => $id, 'feestatus' => 1));
if ($rs > 0) {
echo 1;
exit;
} else {
echo 0;
exit;
}
}
}

这样我们的支付流程就彻底走完了。


二、当我们支付完之后,有些单子可以退单的,如何将款项也退回呢
我们申请退款需要参数有哪些?我们看看支付类里的退款方法


/**
* 申请退款 - 使用商户订单号
* @param $out_trade_no 商户订单号
* @param $out_refund_no 退款单号
* @param $total_fee 总金额(单位:分)
* @param $refund_fee 退款金额(单位:分)
* @param $op_user_id 操作员账号
* @return array
*/
public function refund($out_trade_no,$out_refund_no,$total_fee,$refund_fee,$op_user_id){
$data = array();
$data["appid"] = $this->_config["appid"];
$data["mch_id"] = $this->_config["mch_id"];
$data["nonce_str"] = $this->get_nonce_string();
$data["out_trade_no"] = $out_trade_no;
$data["out_refund_no"] = $out_refund_no;
$data["total_fee"] = $total_fee;
$data["refund_fee"] = $refund_fee;
$data["op_user_id"] = $op_user_id;
$result = $this->post(self::URL_REFUND, $data,true);return $result;
}

商户订单号,商户提供的退单号,付款金额,退款金额(不能退的比实际付款的多),操作员(一般商户号)


控制器内写退款方法


//申请退款
function refund($id="")
{
if($id==""){
//方便我手动调用退单
$id = $this->uri->segment(3);
}
if (isset($id) && $id != "") {
$this->load->model('publist');
//1、取消订单可以退款。2、失败订单可以退款
$pub = $this->publist->GetList(array('id' => $id));
if ($pub->liststatus == 3 || $pub->liststatus == 4) {
$listno = $pub->listno;
$fee = $pub->fee * 100;
$this->load->config('wxpay_config');
$wxconfig['appid']=$this->config->item('appid');
$wxconfig['mch_id']=$this->config->item('mch_id');
$wxconfig['apikey']=$this->config->item('apikey');
$wxconfig['appsecret']=$this->config->item('appsecret');
$wxconfig['sslcertPath']=$this->config->item('sslcertPath');
$wxconfig['sslkeyPath']=$this->config->item('sslkeyPath');
$this->load->library('Wechatpay',$wxconfig); if (isset($listno) && $listno != "") {
$out_trade_no = $listno;
$total_fee = $fee;
$refund_fee = $fee;
//自定义商户退单号
$out_refund_no=$wxconfig['mch_id'].date("YmdHis");
$result=$this->wechatpay->refund($out_trade_no,$out_refund_no,$total_fee,$refund_fee,$wxconfig['mch_id']);log::DEBUG(json_encode($result));
if (isset($result["return_code"]) && $result["return_code"]="SUCCESS"&&isset($result["result_code"]) && $result["result_code"]="SUCCESS") {
echo "";
}
//佣金状态更改为已退款
$this->publist->UpdateList(array('id'=>$id,'liststatus'=>3,'listoutno'=>$out_refund_no));
redirect('home/myorder');
}
}
}
}

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