小程序端
/**
* 微信支付接口
*/
wxPaymoney:function (out_trade_no, true_money){ //out_trade_no 后台统一下单接口需要用
var that = this
wx.hideToast() //隐藏toast
wx.request({
method: 'POST',
data: {
openid: '************', //调用人的openid
out_trade_no: out_trade_no,
body: '答题奖金',
no****rl: 'https://www.q**************.php',//后台接口自动修改订单状态
t*****e: true_money //支付金额
},
url: 'https://b***************gn.php', //服务器接口（微信统一下单接口）
header: {
'Content-Type': 'application/x-www-form-urlencoded'
},
success: function (res) {
console.log(res.data)
console.log('调起支付')
wx.requestPayment({ //成功之后，调用小程序微信支付
'timeStamp': res.data.timeStamp,
'nonceStr': res.data.nonceStr,
'package': res.data.package,
'signType': 'MD5',
'paySign': res.data.paySign,
success: function (res) {
console.log(res)
wx.showToast({
title: '支付成功',
icon: 'success',
duration: 3000
})
},
fail: function (res) {
console.log('付款失败');
wx.showModal({
title: '提醒',
content: '付款失败,如要出题请重新编辑题目',
showCancel: false,
success:function(){
wx.redirectTo({
url: '/pa*******ndex',
})
}
})
return
},
})
},
fail: function (res) {
console.log(res.data)
}
})
}
服务器端
<?php
$appid='********'; //准备数据（都在后台系统中可查到）
$mch_id='12******02'; //商户号
$key='lk******aFK12';
$openid = trim($_POST['openid']);
//$out_trade_no = $mch_id.time();
$out_trade_no = trim($_POST['out_trade_no']);
//$body = "答题奖金";
$body = $_POST['body'];
//$notify_url = 'http://w***************y.php';
$notify_url = trim($_POST['notify_url']);
$to**ee = floatval($_POST['to****e']);
$str = var_export($_POST,true);
file_put_contents("set.txt",$str."\n",FILE_APPEND); $weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$to****,$notify_url);
$return=$weixinpay->pay();
echo json_encode($return);
/*
* 小程序微信支付
*/
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,$notify_url) {
$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;
$this->notify_url = $notify_url;
}
public function pay() {
//统一下单接口
$return = $this->weixinapp();
return $return;
}
//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;
}
//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' => $this->body,
'out_trade_no'=> $this->out_trade_no,
'total_fee' => $this->t***ee,
'spbill_create_ip' => '1****8', //终端IP
'notify_url' => $this->notify_url, //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) {
$xml = "<root>";
foreach ($arr as $key => $val) {
if (is_array($val)) {
$xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
} else {
$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
}
}
$xml .= "</root>";
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 = "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;
}
}
?>