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详解:
发起微信支付。
Object参数说明:
参数 | 类型 | 必填 | 说明 |
---|---|---|---|
timeStamp | String | 是 | 时间戳从1970年1月1日00:00:00至今的秒数,即当前的时间 |
nonceStr | String | 是 | 随机字符串,长度为32个字符以下。 |
package | String | 是 | 统一下单接口返回的 prepay_id 参数值,提交格式如:prepay_id=* |
signType | String | 是 | 签名算法,暂支持 MD5 |
paySign | String | 是 | 签名,具体签名方案参见小程序支付接口文档; |
success | Function | 否 | 接口调用成功的回调函数 |
fail | Function | 否 | 接口调用失败的回调函数 |
complete | Function | 否 | 接口调用结束的回调函数(调用成功、失败都会执行) |
了解更多信息,请查看微信支付接口文档
回调结果:
回调类型 | errMsg | 说明 |
---|---|---|
success | requestPayment:ok | 调用支付成功 |
fail | requestPayment:fail cancel | 用户取消支付 |
fail | requestPayment:fail (detail message) | 调用支付失败,其中 detail message 为后台返回的详细失败原因 |
demo
//index.js
//获取应用实例
const app = getApp()
Page({
data: {
},
onLoad: function () {
wx.login({
success(res) {
if (res.code) {
//登陆
wx.request({
url: 'http://localhost/login.php',
method: 'POST',
data: {
code: res.code
},
header: {
"content-type": "application/x-www-form-urlencoded"
},
success(res) {
console.log(res.data)
wx.request({
url: 'http://localhost/pay1.php',
method: 'POST',
data: {
total_fee: 11,
openid: res.data
},
header: {
"content-type": "application/x-www-form-urlencoded"
},
success(res) {
console.log(res.data)
pbj =res.data;
wx.requestPayment({
'timeStamp': pbj.timeStamp,
'nonceStr': pbj.nonceStr.toString(),
'package': pbj.package,
'signType': 'MD5',
'paySign': pbj.paySign,
'success': function (res) {
console.log("吊起支付:" + res)
},
'fail': function (res) {
console.log("失败" + JSON.stringify(pbj.nonceStr))
},
'complete': function (res) { console.log("res" + JSON.stringify(res)) },
})
}
})
}
})
} else {
console.log('登录失败!' + res.errMsg)
}
}
})
}
})
login.php
pay1.php
'wx4d7fcc145ca8013b',//微信小程序appid
'mch_id' => 1555453311,//商户号id
'nonce_str' => (string) mt_rand(10000, 99999), //随机数
'body' => '会员', //商品标识
'out_trade_no' => 'jay2019_' . time(),//订单号,要唯一的
'total_fee' => 100,//金额,以分为单位
'spbill_create_ip' => '106.54.254.212',//服务器IP地址
'notify_url' => 'https://aikaoya.cloudlinks.com.cn/index.php',//能访问的地址
'trade_type' => 'JSAPI',
'openid' => $_POST['openid']// 小程序传来的OpenID
];
// 按照要求计算sign
ksort($params);
$sequence = '';
foreach ($params as $key => $value) {
$sequence .= "$key=$value&";
}
$sequence = $sequence . "key=shige1351shige1351shige135123456";//商户号密钥
$params['sign'] = strtoupper(md5($sequence));
// 给微信发出的请求,整个参数是个XML
$xml = '' . PHP_EOL;
foreach ($params as $key => $value) {
$xml .= "<$key>$value$key>" . PHP_EOL;
}
$xml .= ' ';
$prepayId = https_curl_json('https://api.mch.weixin.qq.com/pay/unifiedorder',$xml);
$response= [
'appId' => 'wx4d7fcc145ca8013b',
// 随机串,32个字符以内
'nonceStr' => (string) mt_rand(100005645, 9999956464),
// 微信规定
'package' => 'prepay_id='.$prepayId,
'signType' => 'MD5',
// 时间戳,注意得是字符串形式的
'timeStamp' => (string) time(),
];
$sequence = '';
foreach ($response as $key => $value) {
$sequence .= "$key=$value&";
}
$response['paySign'] = strtoupper(md5("{$sequence}key=shige1351shige1351shige135123456"));//商户号密钥
echo urldecode(json_encode($response));
/* 发送json格式的数据,到api接口 -xzz0704 */
function https_curl_json($url,$data){
$curl = curl_init();
//设置url
curl_setopt($curl, CURLOPT_URL,$url);
//设置发送方式:post
curl_setopt($curl, CURLOPT_POST, true);
//试试手气新增,增加之后 curl 不报 60# 错误,可以请求到微信的响应
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); //不验证 SSL 证书
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);//不验证 SSL 证书域名
//设置发送数据
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
//TRUE 将curl_exec()获取的信息以字符串返回,而不是直接输出
curl_setopt($curl, CURLOPT_RETURNTRANSFER, TRUE);
$return_xml = curl_exec($curl);
//关闭cURL资源,并且释放系统资源
curl_close($curl);
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
//先把xml转换为simplexml对象,再把simplexml对象转换成 json,再将 json 转换成数组。
$value_array = json_decode(json_encode(simplexml_load_string($return_xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
$return_xml = $value_array['prepay_id'];
if ($return_xml) {
return $return_xml;
} else {
$error = curl_errno($curl);
return "curl error, error code ".$error;
//throw new WxPayException("curl出错,错误码:$error");
}
}
?>
完成
统一下单参考php
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' => '2015450806125348', //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' => 'http://www.weixin.qq.com/wxpay/pay.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) {
$xml = "";
foreach ($arr as $key => $val) {
if (is_array($val)) {
$xml .= "<" . $key . ">" . arrayToXml($val) . "" . $key . ">";
} else {
$xml .= "<" . $key . ">" . $val . "" . $key . ">";
}
}
$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 = $this->unifiedorder();
// print_r($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;
}
}