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| <?php
namespace App\Helper\Pay;
use GuzzleHttp\Client;
class WxApp
{
private $app_id;
private $secret;
private $mch_id;
private $wx_pay_url = 'https://api.mch.weixin.qq.com';
private $pay_uri = '/pay/unifiedorder';
private $order_query_uri = '/pay/orderquery';
public function __construct()
{
$this->app_id = 'app_id';
$this->secret = 'secret';
$this->mch_id = 'mch_id';
}
public function pay(float $totalFee, string $orderNo, string $orderName, string $notifyUrl, string $openId) : array
{
$data = [
'appid' => $this->app_id,
'mch_id' => $this->mch_id,
'nonce_str' => $this->generateNonceStr(),
'sign_type' => 'MD5',
'body' => $orderName,
'out_trade_no' => $orderNo,
'fee_type' => 'CNY',
'total_fee' => intval($totalFee * 100),
'spbill_create_ip' => request()->getClientIp(),
'time_start' => date('YmdHis'),
'notify_url' => $notifyUrl,
'trade_type' => 'JSAPI',
'openid' => $openId
];
$data['sign'] = $this->generateSignature($data);
$payXmlStr = $this->arrayToXml($data);
$unifiedOrder = $this->request($this->pay_uri, $payXmlStr);
if (!$unifiedOrder) {
throw new \Exception('支付请求失败');
}
if ($unifiedOrder['return_code'] != 'SUCCESS') {
throw new \Exception($unifiedOrder['return_msg'] ?? '支付请求失败');
}
if ($unifiedOrder['result_code'] != 'SUCCESS') {
throw new \Exception($unifiedOrder['err_code'] ?? '支付请求失败');
}
return $this->getWxPayData($unifiedOrder);
}
public function notify($notify)
{
if (!$notify) {
throw new \Exception('Parse XML Error');
}
if ($notify['return_code'] != 'SUCCESS') {
throw new \Exception($notify['return_msg']));
}
if ($notify['result_code'] != 'SUCCESS') {
throw new \Exception($notify['err_code']));
}
$signature = $notify['sign'];
$array = (array)$notify;
unset($array['sign']);
if ($signature != $this->generateSignature($array)) {
throw new \Exception('签名验证失败');
}
return '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';
}
public function query(string $orderNo, ?string $wxOrderNo='')
{
$data = [
'appid' => $this->app_id,
'mch_id' => $this->mch_id,
'out_trade_no' => $orderNo,
'nonce_str' => $this->generateNonceStr(),
'sign_type' => 'MD5'
];
$wxOrderNo && $data['transaction_id'] = $wxOrderNo;
$data['sign'] = $this->generateSignature($data);
$payXmlStr = $this->arrayToXml($data);
$unifiedOrder = $this->request($this->order_query_uri, $payXmlStr);
if (!$unifiedOrder) {
throw new \Exception('订单查询失败');
}
if ($unifiedOrder['return_code'] != 'SUCCESS') {
throw new \Exception($unifiedOrder['return_msg'] ?? '订单查询失败');
}
if ($unifiedOrder['result_code'] != 'SUCCESS') {
throw new \Exception($unifiedOrder['err_code'] ?? '订单查询失败');
}
return $unifiedOrder;
}
private function generateNonceStr(?int $length = 16)
{
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$str = '';
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
private function generateSignature(array $params)
{
ksort($params, SORT_STRING);
$formatStr = $this->formatQueryStr($params);
return strtoupper(md5($formatStr));
}
private function formatQueryStr(array $params)
{
$formatStr = "";
foreach ($params as $key => $val) {
$formatStr .= "{$key}={$val}&";
}
return $formatStr."key=".$this->secret;
}
private function arrayToXml(array $params)
{
$xml = "<xml>";
foreach ($params as $key => $val) {
if (is_numeric($val)) {
$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
} else
$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";
}
$xml .= "</xml>";
return $xml;
}
private function getWxPayData($unifiedOrder) : array
{
$data = [
'appId' => $this->app_id,
'timeStamp' => time(),
'nonceStr' => $this->generateNonceStr(),
'package' => "prepay_id=" . $unifiedOrder['prepay_id'],
'signType' => 'MD5'
];
$data['paySign'] = $this->generateSignature($data);
return $data;
}
private function request(string $url, string $params)
{
$url = $this->wx_pay_url . $url;
$client = new Client(['verify' => false]);
$response = $client->request('POST', $url, [
'body' => $body
]);
$code = $response->getStatusCode();
if ($code === 200) {
$content = $response->getBody()->getContents();
return simplexml_load_string($content, 'SimpleXMLElement', LIBXML_NOCDATA);
}
return null;
}
}
|
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