PHP(TP5) 微信小程序支付(jsapi)(直接复制)

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; 
  } 
  
  
}

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