php + uniapp发送微信小程序红包

php 后台：

1：想要领取红包，先要发红包，生成红包参数

public function send(){//随机字符串$nonce_str = $this->createNoncestr();//商户订单号,需要每次随机，这里做测试，所以先写死了$mch_billno = "10000098201411111234567890";//商户号$mch_id = "1624732058";//小程序账号appid$wxappid = "wxfXXXXXXXXXX";//商户名称$send_name = "XXXX";//用户小程序openid$re_openid = "oxxxxxxxxxxxx";//付款金额，单位分$total_amount = 100;//红包发放总人数$total_num = 1;//红包祝福语$wishing = "获得分成啦，好开心";//活动名称$act_name = "商品分成";//备注$remark = "推荐越多得越多，快来！";//通知用户形式$notify_way = "MINI_PROGRAM_JSAPI";$parameters = array('nonce_str' => $nonce_str,'mch_billno' => $mch_billno,'mch_id' => $mch_id,'wxappid' => $wxappid,'send_name' => $send_name,'re_openid' => $re_openid,'total_amount' => $total_amount,'total_num' => $total_num,'wishing' => $wishing,'act_name' => $act_name,'remark' => $remark,'notify_way' => $notify_way);//生成签名，所有参数+key然后MD5$parameters['sign'] = $this->getSign($parameters);$xmlData = $this->arrayToXml($parameters);
//        var_dump($xmlData);$curlres = $this->postXmlCurl($xmlData, "https://api.mch.weixin.qq.com/mmpaymkttransfers/sendminiprogramhb");
//        var_dump($curlres);$res = $this->xmlToArray($curlres);var_dump($res);exit;return $res;}private function postXmlCurl($xml, $url){$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);//设置headercurl_setopt($ch, CURLOPT_HEADER, FALSE);//要求结果为字符串且输出到屏幕上curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);//post提交方式curl_setopt($ch, CURLOPT_POST, TRUE);curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);curl_setopt($ch, CURLOPT_TIMEOUT, 20);curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);//证书的位置
//        var_dump(curl_setopt($ch, CURLOPT_SSLCERT, __DIR__ . '/cert/apiclient_cert.pem'));die;curl_setopt($ch, CURLOPT_SSLCERT,  '/data/xx/ht/extend/pay-php-sdk/cert/apiclient_cert.pem');//证书key的位置curl_setopt($ch, CURLOPT_SSLKEY,'/data/xx/ht/extend/pay-php-sdk/cert/apiclient_key.pem');//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);throw new Exception("curl出错，错误码:$error");}}//数组转换成xmlprivate function arrayToXml($arr) {$xml = "";foreach ($arr as $key => $val) {if (is_array($val)) {$xml .= "<" . $key . ">" . $this->arrayToXml($val) . "";} else {$xml .= "<" . $key . ">" . $val . "";}}$xml .= "";return $xml;}//xml转换成数组private function xmlToArray($xml) {//禁止引用外部xml实体libxml_disable_entity_loader(true);$xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);$val = json_decode(json_encode($xmlstring), true);return $val;}//作用：产生随机字符串，不长于32位private function createNoncestr($length = 32) {$chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";$str = "";for ($i = 0; $i < $length; $i++) {$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);}return $str;}//作用：生成签名private function getSign($Obj) {$key = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxx";  //商户支付keyforeach ($Obj as $k => $v) {//不为空的参数才参与签名if(!empty($v)){$Parameters[$k] = $v;}}//签名步骤一：按字典序排序参数ksort($Parameters);$String = $this->formatBizQueryParaMap($Parameters, false);//签名步骤二：在string后加入KEY$String = $String . "&key=" . $key;//签名步骤三：MD5加密$String = md5($String);//签名步骤四：所有字符转为大写$result = strtoupper($String);return $result;}//作用：格式化参数，签名过程需要使用private function formatBizQueryParaMap($paraMap, $urlencode) {$buff = "";ksort($paraMap);foreach ($paraMap as $k => $v) {if ($urlencode) {$v = urlencode($v);}$buff .= $k . "=" . $v . "&";}$reqPar = '';if (strlen($buff) > 0) {$reqPar = substr($buff, 0, strlen($buff) - 1);}return $reqPar;}

        2. 返回结果中有我们需要的package

     3.package进行urlencode，在php中代码就是

$package = urlencode("sendid=ef374b7xxxxxxx&xxxxx");

     4. 支付签名

 $parameters = ["appId"=>"wxxxxxxxxxxx",    //小程序appid"timeStamp"=>"1686807639",    //时间戳"nonceStr"=>$this->createNoncestr(),    //随机32位字符串"package"=>"sendid%3Def3xxxxxxxxx"      //刚才生成的urlencode后的package];$sign = $this->getSign($parameters);

uniapp端：

        注：小程序红包只有在扫码进入的时候，红包才会生效

			wx. sendBizRedPacket ({timeStamp: '1686807639', // 支付签名时间戳，nonceStr: 'BXb1WNvpH1K5EaTt2Ye56bvZoDsrCBYk', // 支付签名随机串，不长于 32 位package: 'sendid%3XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX', //扩展字段，由商户传入signType: 'MD5', // 签名方式，paySign: '015D684D67EC62863A54FCD91CA73A8C', // 支付签名success:function(res){console.log(res);},fail:function(res){console.log(res);},complete:function(res){console.log(res);}})

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