CI:3.0.5
微信支付API類庫來自:https://github.com/zhangv/wechat-pay
請先看一眼官方場景及支付時序圖: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
二維碼生成類庫:phpqrcode
走了幾天的彎路,直到遇到Lamtin指點(熱心網友),他說你既然是集成到CI為何不自己寫,我想了想是啊,為什么我一直陷入官方sdk的漩渦里不能跳出來去看這件事,官方提供了API接口,你只需要去調用這些接口啊,post參數啊,是吧,后悔浪費了3天時間。為了不讓你們和我一樣我把我的思路及代碼發布出來,有什么問題可以留言。
我們為什么使用三方支付類庫?
縱觀微信支付的sdk或者其他的微信支付demo,或多或少的都是圍繞官方API接口來寫,增加些自己用的方法方便調用之類的,而如果我自己再去寫這樣的一個東西,第一可能組織不好,基礎弱啊,第二可能需要花費大量時間,鑒於此我去尋找比較好用的別人封裝的API類庫好了,終於不負所望,真有,只可以這個類庫幾乎沒有人用,不過真不錯
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';
/**
* 錯誤信息
*/
public $error = null;
/**
* 錯誤信息XML
*/
public $errorXML = null;
/**
* 微信支付配置數組
* appid 公眾賬號appid
* mch_id 商戶號
* apikey 加密key
* appsecret 公眾號appsecret
* sslcertPath 證書路徑(apiclient_cert.pem)
* sslkeyPath 密鑰路徑(apiclient_key.pem)
*/
private $_config;
/**
* @param $config 微信支付配置數組
*/
public function __construct($config) {
$this->_config = $config;
}
/**
* JSAPI獲取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);
}
/**
* 統一下單接口
*/
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){
//使用證書:cert 與 key 分別屬於兩個.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;
}
/**
* 數據簽名
* @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) {
$xml = "<xml>" . PHP_EOL;
foreach ($array as $k => $v) {
if($v && trim($v)!='')
$xml .= "<$k><![CDATA[$v]]></$k>" . PHP_EOL;
}
$xml .= "</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;
}
/**
* 掃碼支付(模式二)獲取支付二維碼
* @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;
}
}
/**
* 查詢訂單
* @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;
}
/**
* 關閉訂單
* @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;
}
/**
* 申請退款 - 使用商戶訂單號
* @param $out_trade_no 商戶訂單號
* @param $out_refund_no 退款單號
* @param $total_fee 總金額(單位:分)
* @param $refund_fee 退款金額(單位:分)
* @param $op_user_id 操作員賬號
* @return array
*/
public function refund($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;
}
/**
* 申請退款 - 使用微信訂單號
* @param $out_trade_no 商戶訂單號
* @param $out_refund_no 退款單號
* @param $total_fee 總金額(單位:分)
* @param $refund_fee 退款金額(單位:分)
* @param $op_user_id 操作員賬號
* @return array
*/
public function refundByTransId($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;
}
/**
* 下載對賬單
* @param $bill_date 下載對賬單的日期,格式:20140603
* @param $bill_type 類型
* @return array
*/
public function downloadBill($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 $result;
}
/**
* 獲取js支付使用的第二個參數
*/
public function get_package($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;
}
/**
* 獲取發送到通知地址的數據(在通知地址內使用)
* @return 結果數組,如果不是微信服務器發送的數據返回null
* appid
* bank_type
* cash_fee
* fee_type
* is_subscribe
* mch_id
* nonce_str
* openid
* out_trade_no 商戶訂單號
* result_code
* return_code
* sign
* time_end
* total_fee 總金額
* trade_type
* transaction_id 微信支付訂單號
*/
public function get_back_data() {
$xml = file_get_contents("php://input");
$data = $this->xml2array($xml);
if ($this->validate($data)) {
return $data;
} else {
return null;
}
}
/**
* 驗證數據簽名
* @param $data 數據數組
* @return 數據校驗結果
*/
public function validate($data) {
if (!isset($data["sign"])) {
return false;
}
$sign = $data["sign"];
unset($data["sign"]);
return $this->sign($data) == $sign;
}
/**
* 響應微信支付后台通知
* @param $return_code 返回狀態碼 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:此類庫集成到ci我們要改名WechatPay改為Wechatpay讓他符ci類庫規范,而且文件名也要改保持統一性
二、把Wechatpay.php放在application\libraries文件夾內,將證書之類的,日志文件之類的放置在和wechatpay.php同級目錄下即可,當然可以隨便放
三、將微信配置信息,商戶號、appid、AppSecret、API key、證書位置等信息放在wxpay_config.php文件中,放在application\config目錄中
wxpay_config.php代碼
<?php defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Created by PhpStorm.
* User: sxq
* Date: 2016-04-20
* Time: 16:59
*/
$config['appid'] = '你的公眾號appid';
$config['mch_id'] = '你的商戶號';
$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,這份文件在微信官方sdk中,使用文件有phpqrcode文件夾和qrcode.php也一同放置在application\libraries文件夾內
五、日志文件log.php,這份文件在微信官方sdk中也一同放置在application\libraries文件夾內
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);
//我在控制器最頂部加了這個實例化,日志文件放在了application/logs文件夾
//調用方式:log::debug("輸出信息");簡單記錄執行信息方便調試
六、配置信息寫完后,那么在控制器里調用吧(滿滿的全是干貨)
我們首先按照常規的加載配置信息代碼一樣去加載微信配置信息,最后再加載三方類庫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');
//由於此類庫構造函數需要傳參,我們初始化類庫就傳參數給他吧
$this->load->library('Wechatpay',$wxconfig);
這步基礎信息配置完畢,接下來我們需要構造統一下單API接口參數
$param['body']="商品名稱(自行看文檔具體填什么)";
$param['attach']="我有個參數要傳我就穿了個id過來,這里不要有空格避免出錯";
$param['detail']="我填了商品名稱加訂單號";
$param['out_trade_no']="商戶訂單號";
$param['total_fee']="金額,記得乘以100,微信支付單位默認分";//如$total_fee*100
$param["spbill_create_ip"] =$_SERVER['REMOTE_ADDR'];//客戶端IP地址
$param["time_start"] = date("YmdHis");//請求開始時間
$param["time_expire"] =date("YmdHis", time() + 600);//請求超時時間
$param["goods_tag"] = urldecode($productname);//商品標簽,自行填寫
$param["notify_url"] = base_url()."home/wxnotify";//自行定義異步通知url
$param["trade_type"] = "NATIVE";//掃碼支付模式二
$param["product_id"] = $order->productid;//正好有產品id就傳了個,看文檔說自己定義
//調用統一下單API接口
$result=$this->wechatpay->unifiedOrder($param); //這里可以加日志輸出,log::debug(json_encode($result));
//成功(return_code和result_code都為SUCCESS)就會返回含有帶支付二維碼鏈接的數據
if (isset($result["code_url"]) && !empty($result["code_url"])) { /> //二維碼圖片鏈接
$data['wxurl'] = $result["code_url"];
//這里傳遞商戶訂單號到掃碼視圖,是因為我想做跳轉,根據商戶號去查詢訂單是否支付成功,如果成功了就跳轉,定時輪詢微信服務器(這個誰有好的方法可以分享給我啊,表示感謝啦)
$data['orderno'] = $out_trade_no;
$this->load->view('home/pay', $data);
}

pay.php掃碼視圖頁面代碼如下:這部分代碼來自(https://github.com/Alpha2016/wxpay)
<?php if(isset($wxurl)&&!empty($wxurl)){?>
<div class="bgcolor">
<div class="container">
<div class="panel">
<div class="panel-heading">
<ol class="breadcrumb">
<li><a href="<?php echo base_url().'home';?>">首頁</a><span class='divider'>></span></li>
<li class="active active-tab"><span><?php echo "二維碼支付";?></span></li>
</ol>
</div>
<div class="panel-body">
<div class="page-header">二維碼支付</div>
<div class="text-danger center-block text-center">
<input type="hidden" id="orderno" value="<?php echo $orderno;?>"/>
<img alt="掃碼支付" src="<?php echo base_url().'home/qrcode?data='.urlencode($wxurl);?>" style="width:200px;height:200px;"/>
</div>
</div>
</div>
</div>
</div>
<?php }?>
<script>
// 每半秒請求一次數據,然后判斷,跳轉,增加用戶友好性
$(function(){
orderno = $('#orderno').val();
start = self.setInterval("checkstatus(orderno)", 500);
});
function checkstatus(order_no){
if(order_no == undefined || order_no == ''){
window.clearInterval(start);
}
else{
$.ajax({
url:"<?php echo base_url().'home/queryorder';?>",
type:'POST',
dataType:'json',
data:{orderno:orderno},
success:function(msg){
if(msg.trade_state == "SUCCESS") {
window.clearInterval(start);
alert('支付成功');
location.href = "<?php echo base_url().'home/myorder';?>";
}
}
});
}
}
</script>
其實核心在二維碼鏈接如何轉換成二維碼圖片和如何定時輪詢支付結果
<?php echo base_url().'home/qrcode?data='.urlencode($wxurl);?>這句是調用phpqrcode類庫
輪詢方法代碼:
該部分在home控制器下
function queryorder()
{
$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);
$out_trade_no = $_POST['orderno']; //調用查詢訂單API接口
$array = $this->wechatpay->orderQuery('',$out_trade_no);
echo json_encode($array);
}
那么二維碼類庫調用在這里
function qrcode()
{
require_once(APPPATH.'libraries/phpqrcode/phpqrcode.php');
$url = urldecode($_GET["data"]);
QRcode::png($url);
}
那么二維碼生成支付圖片完成,支付輪詢也完成了,該如何去處理業務邏輯呢?
先說明下,這部分有個弊端,如果客戶一直不支付那么他就一直輪詢,可以自行設置個有效期,我沒有設置。如果在輪詢到處理業務邏輯怎么樣?可以的,但是也有個問題如果客戶直接關掉了,你來不及處理的業務怎么辦?所以還要確保不掉單,還需要再微信異步通知url那里處理下業務
//微信異步通知
function wxnotify()
{
//$postStr = file_get_contents("php://input");//因為很多都設置了register_globals禁止,不能用$GLOBALS["HTTP_RAW_POST_DATA'] //這部分困擾了好久用上面這種一直接受不到數據,或者接受了解析不正確,最終用下面的正常了,有哪位願意指點的可以告知一二
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];//這個需要開啟;always_populate_raw_post_data = On
$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);
libxml_disable_entity_loader(true);
$array= json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
log::debug($xml);
log::debug(json_encode($array));
if($array!=null)
{
$out_trade_no = $array['out_trade_no'];
$trade_no = $array['transaction_id'];
$data['orderid']=$array['attach'];
$this->load->model('payorder');
$payinfo = $this->payorder->GetPayorder(array('orderno' => $out_trade_no));
if (!$payinfo) {
$data['orderno'] = $out_trade_no;
$data['money'] = $array['total_fee'];
$data['tradeno'] = $trade_no;
$rs=$this->payorder->AddPayorder($data);
if($rs>0)
{ //告知微信我成功了
$this->wechatpay->response_back();
}else{ //告知微信我失敗了繼續發
$this->wechatpay->response_back("FAIL");
}
}else{
$this->wechatpay->response_back();
}
}
}
花了5天的時間去研究這個類型的微信支付,花了半天的時間去梳理知識點,整體感覺就是如果API接口少,又有成熟類庫自己去集成吧。希望這些對你有用,覺得有用,高興就打賞一下,不高興贊一下也行啊。有什么問題可以留言

