qingjian/app/service/WechatMiniPay.php

<?php

namespace app\service;


use think\facade\Config;

class WechatMiniPay
{
    protected $WechatMiniPayConfig = [];//微信设置

    // 初始化
    public function __construct()
    {
        Config::load('extra/wechat', 'wechat');
        $this->WechatMiniPayConfig = config('wechat');
    }

    /**
     * 微信小程序支付
     * @static
     * @access public
     * @param $order_number    订单号
     * @param $open_id         用户openid
     * @param $total_fee        支付金额
     * @param $body           支付抬头
     * @param $attach           附加数据
     */
    public function dopay(string $order_number = "",
                          string $open_id = "",
                          float $total_fee = 0,
                          string $body = "充值",
                          string $attach = "充值" ,
                          string $notify_url = ""
    )
    {
        if (!$order_number || !$open_id || !$total_fee || !$body || !$attach) {
            return ["state" => "fail"];
        }
//      开始组建支付数据数组
        $data['param'] = [];
        $data['param']['appid'] = $this->WechatMiniPayConfig["appId"];
        $data['param']['mch_id'] = $this->WechatMiniPayConfig["mchId"];
        $data['param']['nonce_str'] = randomStr(0, 16);
        $data['param']['body'] = $body;
        $data['param']['out_trade_no'] = $order_number;//商户下的唯一订单号
//        $data['param']['total_fee'] = $total_fee * 100;    // 单位：分
        $data['param']['total_fee'] = 1;    // 单位：分
        $data['param']['spbill_create_ip'] = request()->ip();
        $data['param']['notify_url'] = $notify_url;
        $data['param']['trade_type'] = 'JSAPI';//支付方式  NATIVE表示二维码支付
//        $data['param']['product_id'] = $order["commodity_id"];//商品id  非必填
        $data['param']['attach'] = $attach;//附加数据  附加数据，在查询API和支付通知中原样返回，可作为自定义参数使用。
        $data['param']['openid'] = $open_id;//用户openid
        $data['param']['sign'] = wechatSign($data['param'], $this->WechatMiniPayConfig["mchKey"]); //key为商户平台设置的密钥key

        $pay_data = array_to_xml($data['param']);

        //请求支付 JSAPI 不会直接吊起支付请求  返回prepay_id是微信生成的预支付会话标识，用于后续接口调用中使用
        $result_data2 = Tool::httpRequest("https://api.mch.weixin.qq.com/pay/unifiedorder", "post", $pay_data);

        $result_data = xmlToArray($result_data2);


        //如果返回数据验证成功
        if (isset($result_data["prepay_id"]) && isset($result_data["result_code"]) && $result_data["return_code"] == "SUCCESS" && $result_data["result_code"] == "SUCCESS") {
            $js_data = [];
            $js_data["appId"] = $this->WechatMiniPayConfig["appId"];
            $js_data["timeStamp"] = (string)time();
            $js_data["nonceStr"] = $data['param']['nonce_str'];
            $js_data["package"] = "prepay_id=" . $result_data["prepay_id"];
            $js_data["signType"] = "MD5";
            $js_data["paySign"] = wechatSign($js_data, $this->WechatMiniPayConfig["mchKey"]);;
            return ["state" => "ok", "data" => $js_data];
        } else {
            return (["state" => "fail",
                "message" => "fail:" .
                    (isset($result_data["err_code_des"])
                        ?
                        $result_data["err_code_des"]
                        :
                        '错误'
                    )]);
        }
    }

    /**
     * 微信支付查询
     * @param $order_number    订单号
     */
    public function wechatQueryOrder($order_number = "")
    {
        if (empty($order_number)) {
            return ["state" => "fail", "message" => "fail"];
        }
        $data['param'] = [];
        $data['param']['appid'] = $this->WechatMiniPayConfig["appId"];
        $data['param']['mch_id'] = $this->WechatMiniPayConfig["mchId"];
        $data['param']['nonce_str'] = randomStr(0, 16);
        $data['param']['out_trade_no'] = $order_number;//商户下的唯一订单号
        $data['param']['sign'] = wechatSign($data['param'], $this->WechatMiniPayConfig["mchKey"]); //key为商户平台设置的密钥key
        $xml = array_to_xml($data['param']);
        $wechat_data = Tool::httpRequest("https://api.mch.weixin.qq.com/pay/orderquery", "post", $xml);

        $wechat_data = xmlToArray($wechat_data);

        if ($wechat_data["return_code"] == "SUCCESS") {// 通信标识

            if ($wechat_data["result_code"] == "SUCCESS") {//业务标识   订单不存在或者微信服务器错误

                if ($wechat_data["trade_state"] == "SUCCESS") {//如果支付成功

                    return array("state" => "ok", "queryData" => $wechat_data);
                }
            }
        }
        return array("state" => "fail");
    }


}