小程序代码
wxpay: function(e){
let thisid = e.currentTarget.dataset.id; 这个是订单的id
var that = this;
wx.request({
url: URL +'need/requestPay', 这个是往后台传的地址
data:{
id : thisid
},
method:'post',
success(res){
var data = res.data;
console.log(data)
if (data.error == 0){
app.mistake(data.msg,'../../../');
return false;
}
wx.requestPayment({ //调起支付
//下边参数具体看微信小程序官方文档
timeStamp: data.data.timeStamp,
nonceStr: data.data.nonceStr,
package: data.data.package,
signType: data.data.signType,
paySign: data.data.paySign,
success(res) {
if (res.errMsg == "requestPayment:ok"){
wx.request({ //这个是支付成功后改变订单状态的代码
url: URL+'need/payok',
data:{
id : thisid
},
method:'post',
success(r){
console.log(r);
if(r.data.error == 1){
app.ok('支付成功', '../../../'); 这个是支付成功后的弹窗
that.onLoad();
}
}
})
}
},
fail(res) { }
})
}
})
}
后台代码
使用前先引入WeixinPay.php
public function requestPay()
{
if(!Request::instance()->isPost()){
return $this -> re(0,'请用POST获取数据');
}
$id = input('id');
$rs = Db::name('表名') -> field('id,openid,order_amount,order_payment,order_number') -> where(['id' => $id,'order_payment' => 1]) -> find();
if(empty($rs)){
return $this -> re(0,'未找到此订单');
}
// halt($rs);
$a = new WeixinPay($rs['openid'],$rs['order_number'],'订单支付',$rs['order_amount']);
$pay = $a -> pay(); //下单获取返回值
// halt($pay);
return $this -> re(1,'下单成功',$pay);
}
//支付成功
public function payok()
{
if(!Request::instance()->isPost()){
return $this -> re(0,'请用POST获取数据');
}
$id = input('id');
$rs = Db::name('表名') -> where('id',$id) -> update(['order_payment' => 0,'order_fi' => 3]); //修改表中字段状态
if(empty($rs)){
return $this -> re(0,'失败');
}else{
return $this -> re(1,'成功');
}
}
WeixinPay.php
namespace app\lib;
/*
* 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 $total_fee; */
function __construct($openid,$out_trade_no,$body,$total_fee) {
$this->appid = '***';//你的小程序appid
$this->openid = $openid; //用户的openid我是直接存在表中的，若是你没有存，请百度查询如何获取用户openid
// 商户号
$this->mch_id = '***'; //你的商户号。找不到的在你的小程序里边的微信支付里边找，前提是你必须先开启你的微信支付
// 支付秘钥
$this->key = '***'; //这个是你商户号的api秘钥，在产品中心里边找，
//订单号
$this->out_trade_no = $out_trade_no; //这个我是用的我后台的订单号
// 内容
$this->body = $body; //支付时显示的提示
//金额
$this->total_fee = floatval($total_fee)*100; //这个块使用分为单位的所有要乘100
}
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' => $this->body, //商品描述
'out_trade_no'=> $this->out_trade_no, //商户订单号
'total_fee' => $this->total_fee, //总金额 单位 分
'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
'notify_url' => '****/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 //要是返回该产品权限未开通请在产品中心开通jsAPi他包含的小程序支付
);
//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) . "";
} 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;
}
//微信小程序接口
private function weixinapp() {
//统一下单接口
$unifiedorder = $this->unifiedorder();
//print_r($unifiedorder);
// halt($unifiedorder);
// if($unifiedorder['err_code_des'] == '201 商户订单号重复'){
// return ''
// }
$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 要是返回201则要修改订单号，这个问题测试中容易出现，上线了基本不出现问题
'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;
}
}