[置顶] 实现APP支付QQ，微信，支付宝三方的后端服务------php实现微信APP支付

接上篇支付宝支付，下面我这边讲的是微信支付：

<?php
/**
* Created by PhpStorm.
* User: wyb
* Date: 2017/3/29
* Time: 10:17
*/
class wechatAppPay
{
//接口API URL前缀
const API_URL_PREFIX = 'https://api.mch.weixin.qq.com';
//下单地址URL
const UNIFIEDORDER_URL = "/pay/unifiedorder";
//查询订单URL
const ORDERQUERY_URL = "/pay/orderquery";
//关闭订单URL
const CLOSEORDER_URL = "/pay/closeorder";
//公众账号ID
private $wxappid;
private $appid;
//商户号
private $mch_id ;
//随机字符串
private $nonce_str;
//签名
private $sign;
//商品描述
private $body;
//商户订单号
private $out_trade_no;
//支付总金额
private $total_fee;
//终端IP
private $spbill_create_ip;
//支付结果回调通知地址
private $notify_url='http://apps.ifeimo.com/Sysj218/Recharge/wxpayNotify'; //不能写固定于该文件内，后续变更为外部传入
//交易类型
private $trade_type;
//支付密钥
private $key='269F02392183A8FB13E11A752E5E8FCA';
//证书路径
private $SSLCERT_PATH;
private $SSLKEY_PATH;
//所有参数
private $params = array();
public function __construct($wxappid,$mch_id)
{
$this->appid = $wxappid;
$this->mch_id = $mch_id;
}
/**
* 下单方法
* @param   $params 下单参数
*/
public function unifiedOrder( $params ){
$this->body = $params['body'];
$this->out_trade_no = $params['out_trade_no'];
$this->total_fee = $params['total_fee'];
$this->trade_type = $params['trade_type'];
$this->nonce_str = $this->genRandomString();
$this->spbill_create_ip = $_SERVER['REMOTE_ADDR'];
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->nonce_str;
$this->params['body'] = $this->body;
$this->params['out_trade_no'] = $this->out_trade_no;
$this->params['total_fee'] = $this->total_fee;
$this->params['spbill_create_ip'] = $this->spbill_create_ip;
$this->params['notify_url'] = $params['notify_url'] ? $params['notify_url'] : $this->notify_url;
$this->params['trade_type'] = $this->trade_type;

//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::UNIFIEDORDER_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
}
return $result;
}
/**
* 查询订单信息
* @param $out_trade_no     订单号
* @return array
*/
public function orderQuery( $out_trade_no ){
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->genRandomString();
$this->params['out_trade_no'] = $out_trade_no;
//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::ORDERQUERY_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
if( !empty($result['result_code']) && !empty($result['err_code']) ){
$result['err_msg'] = $this->error_code( $result['err_code'] );
}
return $result;
}
/**
* 关闭订单
* @param $out_trade_no     订单号
* @return array
*/
public function closeOrder( $out_trade_no ){
$this->params['appid'] = $this->appid;
$this->params['mch_id'] = $this->mch_id;
$this->params['nonce_str'] = $this->genRandomString();
$this->params['out_trade_no'] = $out_trade_no;
//获取签名数据
$this->sign = $this->MakeSign( $this->params );
$this->params['sign'] = $this->sign;
$xml = $this->data_to_xml($this->params);
$response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::CLOSEORDER_URL);
if( !$response ){
return false;
}
$result = $this->xml_to_data( $response );
return $result;
}
/**
*
* 获取支付结果通知数据
* return array
*/
public function getNotifyData(){
//获取通知的数据
$xml = $GLOBALS['HTTP_RAW_POST_DATA'];
$data = array();
if( empty($xml) ){
return false;
}
$data = $this->xml_to_data( $xml );
if( !empty($data['return_code']) ){
if( $data['return_code'] == 'FAIL' ){
return false;
}
}
return $data;
}
/**
* 接收通知成功后应答输出XML数据
* @param string $xml
*/
public function replyNotify(){
$data['return_code'] = 'SUCCESS';
$data['return_msg'] = 'OK';
$xml = $this->data_to_xml( $data );
echo $xml;
die();
}
/**
* 生成APP端支付参数
* @param  $prepayid   预支付id
*/
public function getAppPayParams( $prepayid ){
$data['appid']     = $this->appid;//注意 $sign_array['appid'] 里的参数名必须是appid
$data['partnerid'] = $this->mch_id;//注意 $sign_array['partnerid'] 里的参数名必须是partnerid
$data['prepayid']  = $prepayid;//注意 $sign_array['prepayid'] 里的参数名必须是prepayid
$data['package']   = 'Sign=WXPay';//注意 $sign_array['package'] 里的参数名必须是package
$data['noncestr']  = $this->genRandomString();//注意 $sign_array['noncestr'] 里的参数名必须是noncestr
$data['timestamp'] = time();
$data['sign'] = $this->MakeSign( $data );
$info=[
'alipay'=>'',
'appId'=>$data['appid'],//QQ或者微信的应用ID
'bargainorId'=>$data['partnerid'],//QQ商户ID
'tokenId'=> $data['prepayid'],//QQ预备支付ID
'nonce'=>$data['noncestr'],//QQ随机字段串
'timestamp'=>$data['timestamp'],//时间戳
'package'=> $data['package'],//微信
'pubAcc'=>'',//微信
'sign'=>$data['sign'],
];
return $info;
}
/**
* 生成签名
*  @return 签名
*/
public function MakeSign( $params ){
//签名步骤一：按字典序排序数组参数
ksort($params);
$string = $this->ToUrlParams($params);
//签名步骤二：在string后加入KEY
$string = $string . "&key=".$this->key;
//签名步骤三：MD5加密
$string = md5($string);
//签名步骤四：所有字符转为大写
$result = strtoupper($string);
return $result;
}

/**
* 将参数拼接为url: key=value&key=value
* @param   $params
* @return  string
*/
public function ToUrlParams( $params ){
$string = '';
if( !empty($params) ){
$array = array();
foreach( $params as $key => $value ){
$array[] = $key.'='.$value;
}
$string = implode("&",$array);
}
return $string;
}
/**
* 输出xml字符
* @param   $params     参数名称
* return   string      返回组装的xml
**/
public function data_to_xml( $params ){
if(!is_array($params)|| count($params) <= 0)
{
return false;
}
$xml = "<xml>";
foreach ($params as $key=>$val)
{
if (is_numeric($val)){
$xml.="<".$key.">".$val."</".$key.">";
}else{
$xml.="<".$key."><![CDATA[".$val."]]></".$key.">";
}
}
$xml.="</xml>";
return $xml;
}
/**
* 将xml转为array
* @param string $xml
* return array
*/
public function xml_to_data($xml){
if(!$xml){
return false;
}
//将XML转为array
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $data;
}
/**
* 获取毫秒级别的时间戳
*/
private static function getMillisecond(){
//获取毫秒的时间戳
$time = explode ( " ", microtime () );
$time = $time[1] . ($time[0] * 1000);
$time2 = explode( ".", $time );
$time = $time2[0];
return $time;
}
/**
* 产生一个指定长度的随机字符串,并返回给用户
* @param type $len 产生字符串的长度
* @return string 随机字符串
*/
private function genRandomString($len = 32) {
$chars = array(
"a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k",
"l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v",
"w", "x", "y", "z", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",
"S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2",
"3", "4", "5", "6", "7", "8", "9"
);
$charsLen = count($chars) - 1;
// 将数组打乱
shuffle($chars);
$output = "";
for ($i = 0; $i < $len; $i++) {
$output .= $chars[mt_rand(0, $charsLen)];
}
return $output;
}
/**
* 以post方式提交xml到对应的接口url
*
* @param string $xml  需要post的xml数据
* @param string $url  url
* @param bool $useCert 是否需要证书，默认不需要
* @param int $second   url执行超时时间，默认30s
* @throws WxPayException
*/
private function postXmlCurl($xml, $url, $useCert = false, $second = 30){
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch,CURLOPT_URL, $url);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2);
//设置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求结果为字符串且输出到屏幕上
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
if($useCert == true){
//设置证书
//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, WxPayConfig::SSLCERT_PATH);
curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');
//curl_setopt($ch,CURLOPT_SSLKEY, WxPayConfig::SSLKEY_PATH);
}
//post提交方式
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
//运行curl
$data = curl_exec($ch);
//返回结果
if($data){
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
return false;
}
}
/**
* 错误代码
* @param  $code       服务器输出的错误代码
* return string
*/
public function error_code( $code ){
$errList = array(
'NOAUTH'                =>  '商户未开通此接口权限',
'NOTENOUGH'             =>  '用户帐号余额不足',
'ORDERNOTEXIST'         =>  '订单号不存在',
'ORDERPAID'             =>  '商户订单已支付，无需重复操作',
'ORDERCLOSED'           =>  '当前订单已关闭，无法支付',
'SYSTEMERROR'           =>  '系统错误!系统超时',
'APPID_NOT_EXIST'       =>  '参数中缺少APPID',
'MCHID_NOT_EXIST'       =>  '参数中缺少MCHID',
'APPID_MCHID_NOT_MATCH' =>  'appid和mch_id不匹配',
'LACK_PARAMS'           =>  '缺少必要的请求参数',
'OUT_TRADE_NO_USED'     =>  '同一笔交易不能多次提交',
'SIGNERROR'             =>  '参数签名结果不正确',
'XML_FORMAT_ERROR'      =>  'XML格式错误',
'REQUIRE_POST_METHOD'   =>  '未使用post传递参数 ',
'POST_DATA_EMPTY'       =>  'post数据不能为空',
'NOT_UTF8'              =>  '未使用指定编码格式',
);
if( array_key_exists( $code , $errList ) ){
return $errList[$code];
}
}
}

<?php

/**
* @encoding UTF-8
* @author wyb
* @datetime 2017-4-16  11:41:09
* @Description 微信APP支付控制器，不对外访问
*/

namespace Pay\Controller;

use Think\Controller;

/**
* @name
* Class AlipayAppPayController
*/
class WechatAppPayController extends Controller {
//这里的是因为公司有多个产品，所以根据不同产品选择不同的appId，可放在配置文件方便管理
private $appidByTarget = [
'app标识' => 'wxxcxcxzcxcvxxxccc',
'app标识' => 'wxxcxcxzcxcvxxxccc',
'app标识' => 'wxxcxcxzcxcvxxxccc',
'app标识' => 'wxxcxcxzcxcvxxxccc',
'app标识' => 'wxxcxcxzcxcvxxxccc',
'app标识' => 'wxxcxcxzcxcvxxxccc',
];
//这里的是因为公司有多个产品，所以根据不同产品选择不同的商户ID，可放在配置文件方便管理
private $mchIdByTarget = [
'app标识' => '1234223423,
'app标识' => '1234223423',
'app标识' => '1234223423',
'app标识' => '1234223423',
'app标识' => '1234223423',
'app标识' => '1234223423'
];

/**
* 传入订单数据，进行整理、签名后，返回前端APP支付调起SDK信息
* @param array $order 待支付的订单信息，数组中的必要信息如下：
*  $order['id'] : 订单ID
*  $order['price'] : 实付金额，单位：元
*  $order['notifyUrl'] : 支付端异步通知地址，用于接受订单的支付结果
*  $order['target'] : 支付请求的来源，根据不同的来源，需要使用不同的支付账号信息
*  $order['description'] ： 订单介绍
*  $order['time'] ： 订单提交时间
*/
public function getCallSDKInfo($order){
//做简单的参数检查
if(!$order || !is_array($order) || !$order['id'] || !$order['price'] || !$order['notifyUrl'] || !$order['target']){
return false;
}

$wxappid = $this->appidByTarget[$order['target']];//应用ID 字符串
$mch_id = $this->mchIdByTarget[$order['target']];
Vendor('wxpay.wxpay');
$wechat = new \wechatAppPay($wxappid,$mch_id);
$params = [
'body' => $order['description'], //必填项 商品描述
'out_trade_no' => $order['id'], //商家订单ID
'total_fee' => ($order['price']*100), //必填项 订单金额  单位为分
'trade_type' => 'APP',  //必填项 交易类型固定写  APP
'time_start' => date('yyyyMMddHHmmss',$order['add_time']), //可支付有效时间，超过则无效，需要重新请求
'time_expire' => date('yyyyMMddHHmmss',($order['add_time'] + 1800)), //可支付有效时间，超过则无效，需要重新请求
'notify_url' => $order['notifyUrl'],
];
$result = $wechat->unifiedOrder($params);
$data = $wechat->getAppPayParams($result['prepay_id']);
return $data;
}

/**
* 微信查询支付结果
* @param $data
*/
public function enquiriesOrderInfo($data)
{
$wxappid = $this->appidByTarget[$data['target']];//应用ID 字符串
$mch_id = $this->mchIdByTarget[$data['target']];
Vendor('wxpay.wxpay');
$wechat = new \wechatAppPay($wxappid,$mch_id);
$result = $wechat->orderQuery($data['out_trade_no']);
return $result;

}

}

<?php
/**
* 根据相应的场景而写的支付接口
* Created by PhpStorm.
* User: wyb
* Date: 2017/6/1
* Time: 13:51
*/
class productPayController extents Controller{

public function paymentAction(){
IS_POST ||$this->returnError();    //判断是否是POST
$parameters  = I('post.');         //接收所以参数，相应的参数校验我这里就不写，如果有问题可以给我留言反馈
$wechatPay = new WechatAppPayController();//实例化微信的APP控制器类
$order['notifyUrl'] = 'http://xxxxxxxxxxxxxxx;//微信的回调接口
$data = $wechatPay->getCallSDKInfo($order);//调用微信生成预订单并整理好返回验签参数，这里调用上面的类封装的方法
return $data //这里可以根据你们前端定义接受什么数据类型进行转化
}

}

注：这个就是我php后端实现支付的业务的相关代码，若有什么问题反馈请指出，谢谢，（这里并附上我自己的博客地址：blog.taobaoroom.cn,若有什么问题可根据博客上赋有的QQ群地址联系我哦！！