require_once('vendor/autoload.php');

use WeChatPay\Builder;

use WeChatPay\Crypto\Rsa;

use WeChatPay\Util\PemUtil;

// 设置参数

// 商户号

$merchantId = '16375****'; // 实际程序中已填写正确，后面的一样

// 从本地文件中加载「商户API私钥」，「商户API私钥」会用来生成请求的签名

$merchantPrivateKeyFilePath = 'file:///var/www/html/eduxiaoxin/eduplat/payself/cert/apiclient_key.pem'; // 下载并上传了证书

$merchantPrivateKeyInstance = Rsa::from($merchantPrivateKeyFilePath, Rsa::KEY_TYPE_PRIVATE);

// 「商户API证书」的「证书序列号」 ----------- （这个证书序列号到底是什么？我只设置了V2和V3密钥）

$merchantCertificateSerial = 'd89350ecf23854******'; // 这里填写了V3的密钥

// 从本地文件中加载「微信支付平台证书」，用来验证微信支付应答的签名

$platformCertificateFilePath = 'file:///var/www/html/eduxiaoxin/eduplat/payself/cert/apiclient_cert.pem';

$platformPublicKeyInstance = Rsa::from($platformCertificateFilePath, Rsa::KEY_TYPE_PUBLIC);

// 从「微信支付平台证书」中获取「证书序列号」

$platformCertificateSerial = PemUtil::parseCertificateSerialNo($platformCertificateFilePath);

$out_order_no = ‘这里我填了自己生成的32位’;

$receivers = array();

$r = array();

$r['type'] = 'PERSONAL_OPENID';

$r['account'] = 'oZ_jm5uNnNQ7HEUuag5f****';

$r['name'] = '陈*';

$r['amount'] = 2;

//$r['relation_type'] = 'PARTNER';

$r['description'] = '分配';

$receivers[] = $r;

//print_r(json_encode($receivers,JSON_UNESCAPED_UNICODE));

$d = array(

    'appid' => 'wx4bcfe6bd92fb1f7d',

'transaction_id' => '4200001924202308217643494859',

'out_order_no' => $out_order_no,

'receivers' => json_encode($receivers,JSON_UNESCAPED_UNICODE),

'unfreeze_unsplit' => true,

);

// 构造一个 APIv3 客户端实例

$instance = Builder::factory(array(

'mchid' => $merchantId,

    'serial' => $merchantCertificateSerial,

    'privateKey' => $merchantPrivateKeyInstance,

    'certs' => array(

        $platformCertificateSerial => $platformPublicKeyInstance,

    ),

));

$resp = $instance->chain('v3/profitsharing/orders')->post($d);

echo $resp->getBody(), PHP_EOL;

执行出了内部错误，麻烦哪位大神解答一下。