网上的很多PHP微信支付接入教程都颇为复杂,且需要配置和引入较多的文件,本人通过整理后给出一个单文件版的,希望可以给各位想接入微信支付的带来些许帮助和借鉴意义。
需要注意的事项:
1.微信退款到零钱要求必传证书,需要到这里账户中心->账户设置->API安全->下载证书,然后修改代码中的证书路径 2.该文件需放到支付授权目录下,可以在微信支付商户平台->产品中心->开发配置中设置。 3.如提示签名错误可以通过微信支付签名验证工具进行验证:微信公众平台支付接口调试工具 4.错误码参照:参照地址
代码如下:
PHP;">
账户设置->API安全->下载证书,证书路径在第119行和122行修改
* 2.错误码参照 :https://pay.weixin.qq.com/wiki/doc/api/jsapi.PHP?chapter=9_4
*/
header('Content-type:text/html; Charset=utf-8');
$mchid = 'xxxxx'; //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送
$appid = 'xxxxx'; //微信支付申请对应的公众号的APPID
$apiKey = 'xxxxx'; //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
$orderNo = ''; //商户订单号(商户订单号与微信订单号二选一,至少填一个)
$wxOrderNo = ''; //微信订单号(商户订单号与微信订单号二选一,至少填一个)
$totalFee = 0.01; //订单金额,单位:元
$refundFee = 0.01; //退款金额,单位:元
$refundNo = 'refund_'.uniqid(); //退款订单号(可随机生成)
$wxPay = new WxpayService($mchid,$appid,$apiKey);
$result = $wxPay->doRefund($totalFee,$refundFee,$refundNo,$wxOrderNo,$orderNo);
if($result===true){
echo 'refund success';exit();
}
echo 'refund fail';
class WxpayService
{
protected $mchid;
protected $appid;
protected $apiKey;
public $data = null;
public function __construct($mchid,$key)
{
$this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号
$this->appid = $appid; //微信支付申请对应的公众号的APPID
$this->apiKey = $key; //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥
}
/**
* 退款
* @param float $totalFee 订单金额 单位元
* @param float $refundFee 退款金额 单位元
* @param string $refundNo 退款单号
* @param string $wxOrderNo 微信订单号
* @param string $orderNo 商户订单号
* @return string
*/
public function doRefund($totalFee,$wxOrderNo='',$orderNo='')
{
$config = array(
'mch_id' => $this->mchid,'appid' => $this->appid,'key' => $this->apiKey,);
$unified = array(
'appid' => $config['appid'],'mch_id' => $config['mch_id'],'nonce_str' => self::createNonceStr(),'total_fee' => intval($totalFee * 100),//订单金额 单位 转为分
'refund_fee' => intval($refundFee * 100),//退款金额 单位 转为分
'sign_type' => 'MD5',//签名类型 支持HMAC-SHA256和MD5,默认为MD5
'transaction_id'=>$wxOrderNo,//微信订单号
'out_trade_no'=>$orderNo,//商户订单号
'out_refund_no'=>$refundNo,//商户退款单号
'refund_desc'=>'商品已售完',//退款原因(选填)
);
$unified['sign'] = self::getSign($unified,$config['key']);
$responseXml = $this->curlPost('https://api.mch.weixin.qq.com/secapi/pay/refund',self::arrayToXml($unified));
$unifiedOrder = simplexml_load_string($responseXml,'SimpleXMLElement',LIBXML_NOCDATA);
if ($unifiedOrder === false) {
die('parse xml error');
}
if ($unifiedOrder->return_code != 'SUCCESS') {
die($unifiedOrder->return_msg);
}
if ($unifiedOrder->result_code != 'SUCCESS') {
die($unifiedOrder->err_code);
}
return true;
}
public static function curlGet($url = '',$options = array())
{
$ch = curl_init($url);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_TIMEOUT,30);
if (!empty($options)) {
curl_setopt_array($ch,$options);
}
//https请求 不验证证书和host
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
public function curlPost($url = '',$postData = '',$options = array())
{
if (is_array($postData)) {
$postData = http_build_query($postData);
}
$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,$url);
curl_setopt($ch,CURLOPT_POST,CURLOPT_POSTFIELDS,$postData);
curl_setopt($ch,30); //设置cURL允许执行的最长秒数
if (!empty($options)) {
curl_setopt_array($ch,false);
//第一种方法,cert 与 key 分别属于两个.pem文件
//默认格式为PEM,可以注释
curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');
curl_setopt($ch,CURLOPT_SSLCERT,getcwd().'/cert/apiclient_cert.pem');
//默认格式为PEM,可以注释
curl_setopt($ch,CURLOPT_SSLKEYTYPE,CURLOPT_SSLKEY,getcwd().'/cert/apiclient_key.pem');
//第二种方式,两个文件合成一个.pem文件
// curl_setopt($ch,getcwd().'/all.pem');
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
public static function createNonceStr($length = 16)
{
$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
$str = '';
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars,mt_rand(0,strlen($chars) - 1),1);
}
return $str;
}
public static function arrayToXml($arr)
{
$xml = "";
foreach ($arr as $key => $val) {
if (is_numeric($val)) {
$xml .= "<" . $key . ">" . $val . "" . $key . ">";
} else
$xml .= "<" . $key . ">" . $key . ">";
}
$xml .= " ";
return $xml;
}
public static function getSign($params,$key)
{
ksort($params,SORT_STRING);
$unSignParaString = self::formatQueryParaMap($params,false);
$signStr = strtoupper(md5($unSignParaString . "&key=" . $key));
return $signStr;
}
protected static function formatQueryParaMap($paraMap,$urlEncode = false)
{
$buff = "";
ksort($paraMap);
foreach ($paraMap as $k => $v) {
if (null != $v && "null" != $v) {
if ($urlEncode) {
$v = urlencode($v);
}
$buff .= $k . "=" . $v . "&";
}
}
$reqPar = '';
if (strlen($buff) > 0) {
$reqPar = substr($buff,strlen($buff) - 1);
}
return $reqPar;
}
}
?>
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