PHP wechat merchant transfer to change initiating merchant transfer API

<?php

namespace app\api\controller;

use app\common\controller\Api;
use think\Response;
use think\Config;
/**
 *  Example interface 
 */
class Demo extends Api
{

    // If $noNeedLogin If it is empty, it means that all interfaces need to log in to request 
    // If $noNeedRight If it is empty, it means that all interfaces need to verify permissions to request 
    // If the interface has been set, no login is required , Then there is no need for authentication 
    //
    //  Interface without login ,* All 
    protected $noNeedLogin = ['*'];
    //  Authentication free interface ,* All 
    protected $noNeedRight = ['*'];

    /**
     *  The test method 
     *
     */
    public function test()
    {   
        $batch_name   = ' Balance withdrawal ';// Name of transfer 
        $out_trade_no = time().rand(1000,9999);// Odd Numbers 
        $money        = 1;// amount of money 
        $openid       = 'oTQgi5xbXc1diAZ7U_xxxxxxxxxx';// user openid
        $this->tixian($batch_name,$out_trade_no,1,$openid);
    }

    public function tixian($batch_name,$out_trade_no,$money,$openid){
        $url = 'https://api.mch.weixin.qq.com/v3/transfer/batches';
        $pars = [];
        $pars['appid'] = 'wxe801xxxxxxxxxxxx';// Directly connected merchants appid
        $pars['out_batch_no'] = 'sjzz'.date('Ymd').mt_rand(1000, 9999);// Merchant batch number in merchant system , It is required that this parameter can only be represented by numbers 、 Upper and lower case letters make up , Unique within the merchant system 
        $pars['batch_name']   = $batch_name;// Name of the batch transfer 
        $pars['batch_remark'] = $batch_name;// Transfer instructions ,UTF8 code , Most allow 32 Characters 
        $pars['total_amount'] = intval($money * 100);// Total transfer amount   Unit is “ branch ”
        $pars['total_num']    = 1;// Total number of transfers 
        $pars['transfer_detail_list'][0]  = [
                                                'out_detail_no'=>'Dh'.$out_trade_no,
                                                'transfer_amount'=>$pars['total_amount'],
                                                'transfer_remark'=>$batch_name,
                                                'openid'=>$openid
                                        ];// Transfer details list           
        $token  = $this->getToken($pars);// obtain token
        $res    = $this->https_request($url,json_encode($pars),$token);// Send a request 
        $resArr = json_decode($res,true);
        halt($resArr);
        // Successfully returns 
        // array(3) {
        //   ["batch_id"] => string(40) "1030001016101247194272022062900873000000"
        //   ["create_time"] => string(25) "2022-06-29T10:21:30+08:00"
        //   ["out_batch_no"] => string(16) "sjzz202206291647001"
        // }
    }
    function https_request($url,$data = null,$token){
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, (string)$url);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
        if (!empty($data)){
        curl_setopt($curl, CURLOPT_POST, 1);
        curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
        }
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        // Add request header 
        $headers = [
            'Authorization:WECHATPAY2-SHA256-RSA2048 '.$token,
            'Accept: application/json',
            'Content-Type: application/json; charset=utf-8',
            'User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36',
        ];
        if(!empty($headers)){
            curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
        }
        $output = curl_exec($curl);
        curl_close($curl);
        return $output;
    }
    public function getToken($pars)
    {   
        // $url = 'https://api.mch.weixin.qq.com/v3/certificates';
        $url = 'https://api.mch.weixin.qq.com/v3/transfer/batches';
        $http_method = 'POST';// Request method （GET,POST,PUT）
        $timestamp   = time();// Request timestamp 
        $url_parts   = parse_url($url);// Gets the absolute value of the request URL
        $nonce       = $timestamp.rand('10000','99999');// Request random string 
        $body        = json_encode((object)$pars);// Request message body 
        $stream_opts = [
            "ssl" => [
                "verify_peer"=>false,
                "verify_peer_name"=>false,
            ]
        ];

        $apiclient_cert_path = 'https://'.$_SERVER['HTTP_HOST'].'/uploads/apiclient/apiclient_cert.pem';
        $apiclient_key_path  = 'https://'.$_SERVER['HTTP_HOST'].'/uploads/apiclient/apiclient_key.pem';
        
        $apiclient_cert_arr = openssl_x509_parse(file_get_contents($apiclient_cert_path,false, stream_context_create($stream_opts)));
        $serial_no          = $apiclient_cert_arr['serialNumberHex'];// Certificate serial number 
        $mch_private_key    = file_get_contents($apiclient_key_path,false, stream_context_create($stream_opts));// secret key 
        $merchant_id = '160xxxxxxx';// Merchant id
        $canonical_url = ($url_parts['path'] . (!empty($url_parts['query']) ? "?${url_parts['query']}" : ""));
        $message = $http_method."\n".
        $canonical_url."\n".
        $timestamp."\n".
        $nonce."\n".
        $body."\n";
        openssl_sign($message, $raw_sign, $mch_private_key, 'sha256WithRSAEncryption');
        $sign = base64_encode($raw_sign);// Signature 
        $schema = 'WECHATPAY2-SHA256-RSA2048';
        $token = sprintf('mchid="%s",nonce_str="%s",timestamp="%d",serial_no="%s",signature="%s"',
            $merchant_id, $nonce, $timestamp, $serial_no, $sign);// Wechat returns token
        return $token;
    }

}