这里是API逻辑接口
namespace app\api\controller;
use app\common\controller\Api;
use \think\Request;
use think\Db;
use wxpay\WeixinPay;
/*
* 支付
*/
class Pay extends Api
{
public function pay()
{
$openid = $_POST['openid']; //opendi可以自己重新获取也可以存起来 必须要!!!
$orderid = $_POST['orderid']; //这里是订单的id 根据自己需要来
//查询里面的价格
$orderdata = db('order')->where('id',$orderid)->field('order,money')->find();
//引入支付的类 第二个代码块
$wxBizDataCrypt = EXTEND_PATH.'/wxpay/WeixinPay.php';
require_once $wxBizDataCrypt;
$a = new WeixinPay($openid,$orderdata['order'],'微信支付',$orderdata['money']);
$pay = $a -> pay();//下单获取返回值
return info(10000,'获取订单信息成功',$pay);
}
//支付成功的回调 第二个代码块配置
public function notify_url()
{
$path = file_get_contents("php://input");//拿到支付成功的回调 xml格式(可以文件写入一下看看内容)
$time = date('Ymd');
$data = json_decode(json_encode(simplexml_load_string($path, 'SimpleXMLElement', LIBXML_NOCDATA)), true); //先将xml转json 在将json转数组
//判断该订单是否支付成功
if(strtolower($data['result_code']) == 'success' && strtolower($data['return_code']) == 'success'){
Db::startTrans();
try{
//事务逻辑
Db::commit();
//事务提交
} catch (\Exception $e){
Db::rollback();
//事务回滚
}
} else{
return info(10004,'支付失败');
}
}
}
下面就是支付的类 我把它放在 /extend/wxpay 目录中(自行创建)
namespace wxpay; //命名空间 方便在API中调用
/*
* 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 = '';//小程序appid
$this->openid = $openid; //用户的openid
// 商户号
$this->mch_id = ''; //商户号 微信商户平台中查找
// 支付秘钥
$this->key = ''; //商户号的密钥, 微信商户平台设置
//订单号
$this->out_trade_no = $out_trade_no; //自己生成的订单号
// 内容
$this->body = $body; //支付时显示的提示
//金额
$this->total_fee = floatval($total_fee)*100;//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'; //应该是同步回调地址(不需要更改)
$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' => '', //支付成功回调地址,注意1. 确保外网能正常访问 2.https
'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) . " . $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);
// 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;
}
}