公司项目有一个用户钱包系统，用户创作的内容可以收到游客的打赏，当然就需要提现的接口了。

最终选定的是支付宝转账接口，公司代收账户直接打款给用户绑定的支付宝账号，再也不用人工手动打款了。

上代码

准备好工具，支付宝sdk，去支付宝开放平台下载啦。

我把sdk放到了根目录下的extend目录下，证书放在extend/alipayPEM/目录下，这个版本的sdk有点老掉牙了，最新的sdk支持composer加载，但是。。。。还能用为啥要去改。。。

这个是转账代码，等着被调用的，调用方写自己的业务逻辑就行了。

<?php
namespace App\Http\Controllers\Extend;

use App\Http\Controllers\Controller;
use App\Model\Financing\FinancingModel;
use App\Model\Financing\FinancingProfitModel;
use App\Model\Member\MemberWalletModel;
use App\Model\Member\WithdrawalModel;
use Illuminate\Http\Request;
use Illuminate\Support\Env;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Redis;

class ExtendController extends Controller
{

    public $alipayRsaPrivateKey = "这段肯定不能让你们看到啊，支付宝私钥";

    public $alipayAppId = "支付宝应用id";
    public $alipayFormat = "json";
    public $alipayCharset = "UTF-8";
    public $alipaySignType = "RSA2";
    public $alipayGatewayUrl = "https://openapi.alipay.com/gateway.do";
    public $alipayRsaPublic = "../extend/alipayPEM/支付宝公钥证书.crt";
    public $alipayRsaApp = "../extend/alipayPEM/应用公钥证书.crt";
    public $alipayRsaRoot = "../extend/alipayPEM/支付宝根证书.crt";

    /**
     * 支付宝转账到第三方
     */
    public function alipay_transfer(WithdrawalModel $withdrawalModel)
    {
        try {
            require_once '../extend/alipay/AopCertClient.php';
            require_once '../extend/alipay/AopClient.php';
            require_once "../extend/alipay/request/AlipayFundTransUniTransferRequest.php";
            $aop                          = new \AopCertClient();
            $aop->gatewayUrl              = $this->alipayGatewayUrl;
            $aop->appId                   = $this->alipayAppId;
            $aop->signType                = $this->alipaySignType;
            $aop->postCharset             = $this->alipayCharset;
            $aop->format                  = $this->alipayFormat;
            $aop->rsaPrivateKey           = $this->alipayRsaPrivateKey;
            $aop->alipayrsaPublicKey      = $aop->getPublicKey($this->alipayRsaPublic);
            $aop->isCheckAlipayPublicCert = true;
            $aop->appCertSN               = $aop->getCertSN($this->alipayRsaApp);
            $aop->alipayRootCertSN        = $aop->getRootCertSN($this->alipayRsaRoot);
            $request = new \AlipayFundTransUniTransferRequest();
            //TRANS_BANKCARD_NO_PWD转账到银行卡 TRANS_ACCOUNT_NO_PWD转账到支付宝
            $request->setBizContent("{" .
                "\"out_biz_no\":\"" . $withdrawalModel['order_id'] . "\"," .
                "\"trans_amount\":" . $withdrawalModel['money'] . "," .
                "\"product_code\":\"TRANS_ACCOUNT_NO_PWD\"," .
                "\"biz_scene\":\"DIRECT_TRANSFER\"," .
                "\"order_title\":\"提现代发\"," .
                "\"payee_info\":{" .
                "\"identity\":\"" . $withdrawalModel['payment']['account'] . "\"," .
                "\"identity_type\":\"ALIPAY_LOGON_ID\"," .
                "\"name\":\"" . $withdrawalModel['payment']['name'] . "\"" .
                "    }," .
                "\"remark\":\"" . $withdrawalModel['remark'] . "\"," .
                "  }");
            $request->setNotifyUrl(env('APP_URL') . "/api/extend/alipay_transfer_notify");
            $result       = $aop->execute($request);
            $responseNode = str_replace(".", "_", $request->getApiMethodName()) . "_response";
            $resultCode   = $result->$responseNode->code;
            if (!empty($result && $resultCode) && $resultCode == 10000) {
                return $result->$responseNode->pay_fund_order_id;
                return true;
            } else {
                self::returnError($result->$responseNode->sub_msg);
            }
        } catch (\Exception $exception) {
            self::returnError($exception->getMessage());
        }
    }
}