<?php
//use Flight;
/**
* 微信支付服务器端下单
* 微信APP支付文档地址: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8_6
* 使用示例
* 构造方法参数
* 'appid' => //填写微信分配的公众账号ID
* 'mch_id' => //填写微信支付分配的商户号
* 'notify_url'=> //填写微信支付结果回调地址
* 'key' => //填写微信商户支付密钥
* );
* 统一下单方法
* $WechatAppPay = new wechatAppPay($options);
* $params['body'] = '商品描述'; //商品描述
* $params['out_trade_no'] = '1217752501201407'; //自定义的订单号，不能重复
* $params['total_fee'] = '100'; //订单金额 只能为整数 单位为分
* $params['trade_type'] = 'APP'; //交易类型 JSAPI | NATIVE |APP | WAP
* $wechatAppPay->unifiedOrder( $params );
*/
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 $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;
//交易类型
private $trade_type;
//支付密钥
private $key;
//证书路径
private $SSLCERT_PATH;
private $SSLKEY_PATH;
//所有参数
private $params = array();
public function __construct($appid, $mch_id, $notify_url, $key)
{
$this->appid = $appid;
$this->mch_id = $mch_id;
$this->notify_url = $notify_url;
$this->key = $key;
}
/**
* 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->scene_info = $params['scene_info'];
$this->nonce_str = $this->genRandomString();
$this->spbill_create_ip = $this->get_client_ip();
$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'] = $this->notify_url;
$this->params['trade_type'] = $this->trade_type;
$this->params['scene_info'] = $this->scene_info;
//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;
}
/**
* @author:周洪亮<white_zhl@163.com>;
* @copyright:2017/12/14;
* @var:用户真实ip地址
*/
public function get_client_ip()
{
$cip = "unknown";
if ($_SERVER['REMOTE_ADDR']) {
$cip = $_SERVER['REMOTE_ADDR'];
} elseif (getenv("REMOTE_ADDR")) {
$cip = getenv("REMOTE_ADDR");
}
return $cip;
}
/**
* 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;
$data['partnerid'] = $this->mch_id;
$data['prepayid'] = $prepayid;
$data['package'] = 'Sign=WXPay';
$data['noncestr'] = $this->genRandomString();
$data['timestamp'] = time();
$data['sign'] = $this->MakeSign($data);
return $data;
}
/**
* 生成签名
* @return 签名
*/
public function MakeSign($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];
}
}
}