微信小程序支付
Posted 样子2018
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一、小程序开通微信支付
二、小程序支付的交互图
三、在商户平台添加授权申请单
四、在小程序后台 M-A授权
点击查看进入如下界面，然后确定绑定
五、下载与安装证书
七、后台参数配置
八、具体代码实
$pay_data = [ \'appId\' => 小程序appid, \'timeStamp\' => time(), \'nonceStr\' => md5(uniqid()), \'package\' => 小程序传给后台的prepay_id, \'signType\' => \'MD5\', ];
通过后台加密得到paySign，然后传给小程序调用API唤起微信支付
wx.requestPayment({ \'timeStamp\': \'\', \'nonceStr\': \'\', \'package\': \'\', \'signType\': \'MD5\', \'paySign\': \'\', \'success\':function(res){}, \'fail\':function(res){}, \'complete\':function(res){} })
附小程序支付文档：https://pay.weixin.qq.com/wiki/doc/api/wxa/wxa_api.php?chapter=7_3&index=1
下面是具体代码实现：
微信小程序支付类封装：
class WeixinPay { protected $appid; protected $mch_id; protected $key; protected $openid; protected $out_trade_no; protected $body; protected $total_fee; function __construct($appid, $openid, $mch_id, $key, $out_trade_no, $body, $total_fee) { $this->appid = $appid; $this->openid = $openid; $this->mch_id = $mch_id; $this->key = $key; $this->out_trade_no = $out_trade_no; $this->body = $body; $this->total_fee = $total_fee; } public function pay() { //统一下单接口 $return = $this->weixinapp(); return $return; } //统一下单接口 private function unifiedorder() { $url = \'https://api.mch.weixin.qq.com/pay/unifiedorder\'; $parameters = array( \'appid\' => $this->appid, //小程序ID \'mch_id\' => $this->mch_id, //商户号 \'nonce_str\' => $this->createNoncestr(), //随机字符串 // \'body\' => \'test\', //商品描述 \'body\' => $this->body, // \'out_trade_no\' => \'2018013106125348\', //商户订单号 \'out_trade_no\' => $this->out_trade_no, // \'total_fee\' => floatval(0.01 * 100), //总金额 单位 分 \'total_fee\' => $this->total_fee, \'spbill_create_ip\' => $_SERVER[\'REMOTE_ADDR\'], //终端IP // \'spbill_create_ip\' => \'192.168.0.161\', //终端IP \'notify_url\' => \'payNotify.php\', //通知地址 确保外网能正常访问 \'openid\' => $this->openid, //用户id \'trade_type\' => \'JSAPI\'//交易类型 ); //统一下单签名 $parameters[\'sign\'] = $this->getSign($parameters); $xmlData = $this->arrayToXml($parameters); $return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60)); return $return; } private static function postXmlCurl($xml, $url, $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($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验 //设置header curl_setopt($ch, CURLOPT_HEADER, FALSE); //要求结果为字符串且输出到屏幕上 curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); //post提交方式 curl_setopt($ch, CURLOPT_POST, TRUE); curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20); curl_setopt($ch, CURLOPT_TIMEOUT, 40); set_time_limit(0); //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($ch); throw new WxPayException("curl出错，错误码:$error"); } } //数组转换成xml private function arrayToXml($arr) { $xml = "<xml>"; foreach ($arr as $key => $val) { if (is_array($val)) { $xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">"; } else { $xml .= "<" . $key . ">" . $val . "</" . $key . ">"; } } $xml .= "</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; } //微信小程序接口 private function weixinapp() { //统一下单接口 $unifiedorder = $this->unifiedorder(); $parameters = array( \'appId\' => $this->appid, //小程序ID \'timeStamp\' => \'\' . time() . \'\', //时间戳 \'nonceStr\' => $this->createNoncestr(), //随机串 \'package\' => \'prepay_id=\' . $unifiedorder[\'prepay_id\'], //数据包 \'signType\' => \'MD5\'//签名方式 ); //签名 $parameters[\'paySign\'] = $this->getSign($parameters); return $parameters; } //作用：产生随机字符串，不长于32位 private function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str = ""; for ($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) { foreach ($Obj as $k => $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=" . $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 $result_; } ///作用：格式化参数，签名过程需要使用 private function formatBizQueryParaMap($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; } }
payNotify.php代码：
$postXml = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信参数 // 接受不到参数可以使用file_get_contents("php://input"); PHP高版本中$GLOBALS好像已经被废弃了 if (empty($postXml)) { return false; } //将xml格式转换成数组 function xmlToArray($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; } $attr = xmlToArray($postXml); $total_fee = $attr[\'total_fee\']; $open_id = $attr[\'openid\']; $itemid = $attr[\'out_trade_no\']; $time = $attr[\'time_end\']; //你的回调逻辑。。。
获取小程序页面参数：
$weixinPay = new WeixinPay($appId, $openid, $mch_id, $key, $out_trade_no, $body, $total_fee); $parameters = $weixinPay->pay();
将$parameters传给小程序：
wx.requestPayment({ \'timeStamp\': res.data.timeStamp, \'nonceStr\': res.data.nonceStr, \'package\': res.data.package, \'signType\': \'MD5\', \'paySign\': res.data.paySign, \'success\': function (res) { console.log(\'success\'); wx.showToast({ title: \'支付成功\', icon: \'success\', duration: 3000 }); }, \'fail\': function (res) { console.log(res); }, \'complete\': function (res) { console.log(\'complete\'); } });
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