The purpose of writing this article is mainly because the SDK provided by the WeChat public platform does not provide an SDK implementation of this function.

In fact, the final implementation still relies on the WeChat public platform development documentation and SDK.

Application scenarios of enterprise payment: Official account pays users who have followed it, such as processing refunds, financial settlements, etc.

Let me talk about the implementation idea first:

Automatically install it in the SDK Extend the WxMchPay component based on the class library to realize the expansion of enterprise payment functions.

Without further ado, let’s get to the code. The following is the component that inherits the SDK to implement enterprise payment:

$parameters parameter reference: Enterprise payment API document

<?php
// 引入SDK
import(&#39;Common.Util.WxPay&#39;);

/**
 * 微信企業(yè)付款操作類
 * Author  :  Max.wen
 * DateTime: <15/9/16 11:00>
 */
class WxMchPay extends Wxpay_client_pub
{
    /**
     * API 參數(shù)
     * @var array
     * &#39;mch_appid&#39;         # 公眾號(hào)APPID
     * &#39;mchid&#39;             # 商戶號(hào)
     * &#39;device_info&#39;       # 設(shè)備號(hào)
     * &#39;nonce_str&#39;         # 隨機(jī)字符串
     * &#39;partner_trade_no&#39;  # 商戶訂單號(hào)
     * &#39;openid&#39;            # 收款用戶openid
     * &#39;check_name&#39;        # 校驗(yàn)用戶姓名選項(xiàng) 針對(duì)實(shí)名認(rèn)證的用戶
     * &#39;re_user_name&#39;      # 收款用戶姓名
     * &#39;amount&#39;            # 付款金額
     * &#39;desc&#39;              # 企業(yè)付款描述信息
     * &#39;spbill_create_ip&#39;  # Ip地址
     * &#39;sign&#39;              # 簽名
     */
    public $parameters = [];

    public function __construct()
    {
        $this->url = &#39;https://api.mch.weixin.qq.com/mmpaymkttransfers/promotion/transfers&#39;;
        $this->curl_timeout = WxPayConf_pub::CURL_TIMEOUT;
    }

    /**
     * 生成請(qǐng)求xml數(shù)據(jù)
     * @return string
     */
    public function createXml()
    {
        $this->parameters[&#39;mch_appid&#39;] = WxPayConf_pub::APPID;
        $this->parameters[&#39;mchid&#39;]     = WxPayConf_pub::MCHID;
        $this->parameters[&#39;nonce_str&#39;] = $this->createNoncestr();
        $this->parameters[&#39;sign&#39;]      = $this->getSign($this->parameters);
        return $this->arrayToXml($this->parameters);
    }


    /**
     *     作用：使用證書(shū)，以post方式提交xml到對(duì)應(yīng)的接口url
     */
    function postXmlSSLCurl($xml,$url,$second=30)
    {
        $ch = curl_init();
        //超時(shí)時(shí)間
        curl_setopt($ch,CURLOPT_TIMEOUT,$second);
        //這里設(shè)置代理，如果有的話
        //curl_setopt($ch,CURLOPT_PROXY, &#39;8.8.8.8&#39;);
        //curl_setopt($ch,CURLOPT_PROXYPORT, 8080);
        curl_setopt($ch,CURLOPT_URL, $url);
        curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE);
        curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE);
        //設(shè)置header
        curl_setopt($ch,CURLOPT_HEADER,FALSE);
        //要求結(jié)果為字符串且輸出到屏幕上
        curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
        //設(shè)置證書(shū)
        curl_setopt($ch,CURLOPT_CAINFO, WxPayConf_pub::SSLROOTCA_PATH);
        //使用證書(shū)：cert 與 key 分別屬于兩個(gè).pem文件
        //默認(rèn)格式為PEM，可以注釋
        curl_setopt($ch,CURLOPT_SSLCERTTYPE,&#39;PEM&#39;);
        curl_setopt($ch,CURLOPT_SSLCERT, WxPayConf_pub::SSLCERT_PATH);
        //默認(rèn)格式為PEM，可以注釋
        curl_setopt($ch,CURLOPT_SSLKEYTYPE,&#39;PEM&#39;);
        curl_setopt($ch,CURLOPT_SSLKEY, WxPayConf_pub::SSLKEY_PATH);

        //post提交方式
        curl_setopt($ch,CURLOPT_POST, true);
        curl_setopt($ch,CURLOPT_POSTFIELDS,$xml);
        $data = curl_exec($ch);
        //返回結(jié)果
        if($data){
            curl_close($ch);
            return $data;
        }
        else {
            $error = curl_errno($ch);
            echo "curl出錯(cuò)，錯(cuò)誤碼:$error"."<br>";
            echo "<a href=&#39;http://curl.haxx.se/libcurl/c/libcurl-errors.html&#39;>錯(cuò)誤原因查詢</a></br>";
            curl_close($ch);
            return false;
        }
    }


}

Controller layer Function implementation:

<?php
/**
 * Author  :  Max.wen
 * DateTime: <15/9/20 16:47>
 */

namespace Home\Controller;


class TestController extends CommonController
{

    /**
     * 企業(yè)付款測(cè)試
     */
    public function rebate()
    {
        import(&#39;Common.Util.WxMchPay&#39;);
        $mchPay = new \WxMchPay();
        // 用戶openid
        $mchPay->setParameter(&#39;openid&#39;, &#39;oy2lbszXkgvlEKThrzqEziKEBzqU&#39;);
        // 商戶訂單號(hào)
        $mchPay->setParameter(&#39;partner_trade_no&#39;, &#39;test-&#39;.time());
        // 校驗(yàn)用戶姓名選項(xiàng)
        $mchPay->setParameter(&#39;check_name&#39;, &#39;NO_CHECK&#39;);
        // 企業(yè)付款金額  單位為分
        $mchPay->setParameter(&#39;amount&#39;, 100);
        // 企業(yè)付款描述信息
        $mchPay->setParameter(&#39;desc&#39;, &#39;開(kāi)發(fā)測(cè)試&#39;);
        // 調(diào)用接口的機(jī)器IP地址  自定義
        $mchPay->setParameter(&#39;spbill_create_ip&#39;, &#39;127.0.0.1&#39;); # getClientIp()
        // 收款用戶姓名
        // $mchPay->setParameter(&#39;re_user_name&#39;, &#39;Max wen&#39;);
        // 設(shè)備信息
        // $mchPay->setParameter(&#39;device_info&#39;, &#39;dev_server&#39;);

        $response = $mchPay->postXmlSSL();
        if( !empty($response) ) {
            $data = simplexml_load_string($response, null, LIBXML_NOCDATA);
            echo json_encode($data);
        }else{
            echo json_encode( array(&#39;return_code&#39; => &#39;FAIL&#39;, &#39;return_msg&#39; => &#39;transfers_接口出錯(cuò)&#39;, &#39;return_ext&#39; => array()) );
        }
    }
}

After completing the above two parts of code, you can basically call the enterprise payment API successfully.

Data structure example of returned result:

{
    "return_code": "SUCCESS",
    "return_msg": { },
    "mch_appid": "wx519cae424099ed6b",
    "mchid": "1228636402",
    "device_info": { },
    "nonce_str": "qjupk84q4iqxkb578hb5h2qiatgcwxwg",
    "result_code": "SUCCESS",
    "partner_trade_no": "test-1442801966",
    "payment_no": "1000018301201509210739170397",
    "payment_time": "2015-09-21 10:19:26"
}

Possible problems:

1. CA certificate error

You can see it in WxMchPay , I rewrote the postXmlSSLCurl() method of Wxpay_client_pub in the SDK

Because this method in the SDK by default does not come with a CA certificate when making a CURL POST request.

In comparison, there are many

curl_setopt($ch,CURLOPT_CAINFO, WxPayConf_pub::SSLROOTCA_PATH); Such a line of code.　

　The function is to attach the CA certificate when requesting.

2. Transfer operations to the same user are too frequent, please try again later.

This error belongs to the limitations of the WeChat server, specific restrictions There is no explanation of the frequency, but after actual testing, it is about 1 minute.

So you need to pay more attention during development.

For more articles related to WeChat development enterprise payment PHP code implementation, please pay attention to the PHP Chinese website!