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# alipay
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===
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## 支付宝支付
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目前只支持支付宝的app唤起支付、回调、退款：
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## 安装
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### Composer
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alipay采用composer进行安装，要使用alipay功能，只需要在composer.json中添加如下依赖：
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```json
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{
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"require": {
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"jucheng/alipay": "1.*"
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}
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}
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```
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### 手动
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1. 手动下载或clone最新版本alipay代码
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2. 把alipay放入项目目录
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3. `require` alipay src目录下面的AlipayClient.php，即可使用，如把alipay放在当前目录下，只需要:
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```php
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require __DIR__ . "/alipay/src/AlipayClient.php";
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```
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## 用法
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- **准备必要参数**
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```php
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//AppID
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$appid = 1400009099;
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// 用户私钥
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$rsaPrivateKey = "用户私钥";
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//支付宝公钥
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$alipayrsaPublicKey="支付宝公钥";
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//支付回调地址
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$notifyUrl="https://www.baidu.com"
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- **app唤起支付**
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```php
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use alipay;
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$app_client=new alipay\AlipayClient($appid,$rsaPrivateKey,$alipayrsaPublicKey);
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$data["total_amount"]="0.01";
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$data["subject"]="预定酒店消费";
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$data["out_trade_no"]="JD201909051809240201";
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$data["product_code"]="QUICK_MSECURITY_PAY";
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$result=$app_client->appPay($data,$notifyUrl);
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```
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> `Note` 如需要自定义data参数 请查看支付宝官方文档 https://docs.open.alipay.com/api_1/alipay.trade.app.pay。
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> `Note` 将$result传给手机端唤起支付。
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- **回调参数验签**
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```php
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use alipay;
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$app_client=new alipay\AlipayClient($appid,$rsaPrivateKey,$alipayrsaPublicKey);
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$flag = $app_client->rsaCheckV1($_POST, NULL, "RSA2");
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```
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> `Note` 对$flag进行操作。
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- **退款**
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```php
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use alipay;
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$app_client=new alipay\AlipayClient($appid,$rsaPrivateKey,$alipayrsaPublicKey);
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$data["out_trade_no"]="JD201909051809240201";
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$data["trade_no"]="2019090922001444760542604693";
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$data["refund_amount"]="0.01";
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$result=$app_client->refundOrder($data);
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```
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> `Note` 退款是否成功对$result进行判断。
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> `Note` 所有方法错误码请以官方错误码为准 https://docs.open.alipay.com/api_1/alipay.trade.app.pay。
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