支付宝接入流程

主要接入支付的支付功能，包括电脑网站支付、手机网站支付、APP支付、当面付。
使用语言：PHP
官方文档：https://doc.open.alipay.com/docs/doc.htm?treeId=193&articleId=105899&docType=1

一、开发前的准备，参考官方文档

https://doc.open.alipay.com/docs/doc.htm?treeId=193&articleId=105894&docType=1

二、下载服务端SDK

https://doc.open.alipay.com/doc2/detail?treeId=54&articleId=103419&docType=1

三、沙箱环境调试
上线前先在沙箱环境下进行测试，支付宝提供了专门的沙箱APP，可以任意充值测试。

注意：使用沙箱环境测试时，需要使用沙箱环境中的相关参数。

四、服务端代码

>>>下载SDK后，删除不要的文件，放入自己的目录中，即可直接使用

五、注意
>>>沙箱环境时有专门的key
>>>程序中使用的公钥是支付的公钥，不是自己生存的公钥。

>>>支付宝类，直接调用SDK中的代码，提供各种支付能力接口。
电脑网站支付：pay函数
手机完整支付：jsPay函数
APP接口：appApi函数，主要用于获取APP支付的相关参数（由于私钥存储在服务端，需要通过私钥加密相关参数）
当面付：generateQrCode函数，内部系统使用，生成当面付的支付二维码，发给客户让客户进行支付。

<?phpclass Dg_Pay_Zhifubao{    /**     * 支付网关     *     * @var string     */    private $gatewayUrl = 'https://openapi.alipay.com/gateway.do';    /**     * 异步通知URL     *      * @var string     */    private $notifyUrl = 'https://www.baidu.com';    /**     * 支付后跳转地址     *      * @var string     */    private $returnUrl = 'https://www.baidu.com';    private $returnUrlM = 'https://www.baidu.com';    /**     * 支付宝分配的应用ID     *      * @var string     */    private $appId = 'xxx';    /**     * 收款支付宝账号     *     * @var string     */    private $sellerEmail = '';    /**     * 卖家支付宝用户号     *     * @var string     */    private $sellerId = 'xxx';    /**     * 商户私钥     *      * @var string     */    private $privateKey;    private $privateKeyPath;    /**     * 支付宝公钥（此处是支付宝生成的公钥）     *      * @var string     */    private $publicKey;    private $publicKeyPath;    /**     * 签名方式     *     * @var string     */    private $signType = 'RSA2';    /**     * 返回值数据类型     *      * @var string     */    private $format = 'json';    /**     * 请求编码     *      * @var string     */    private $charset = 'utf-8';    /**     * 初始化支付参数     *     * @param string $out_trade_no     *            订单号     * @param double $total_fee     *            交易金额     * @param string $subject     *            商品名称     * @param string $body     *            商品描述     */    public function __construct()    {        $this->privateKeyPath = dirname(__FILE__) . DS . 'zhifubao_private_key.pem';        $this->publicKey = 'xxx';                //ToDo 沙箱测试参数        if ( false ) {            $this->gatewayUrl = 'https://openapi.alipaydev.com/gateway.do';            $this->appId = 'xxx';            $this->sellerId = 'xxx';            $this->notifyUrl = 'https://www.baidu.com';            $this->returnUrl = 'https://www.baidu.com';            $this->returnUrlM = 'https://www.baidu.com';            $this->publicKey = 'xxx';        }        //引入支付宝SDK        include_once("alipay/AopSdk.php");    }    /**     * 生成支付地址     *     * @return string     */    public function pay($out_trade_no, $total_fee, $subject = '缴费', $body = '缴费')    {        $client = new AopClient;        $client->gatewayUrl = $this->gatewayUrl;        $client->appId = $this->appId;        $client->rsaPrivateKeyFilePath = $this->privateKeyPath;        $client->alipayrsaPublicKey = $this->publicKey;        $client->apiVersion = '1.0';        $client->signType = $this->signType;        $client->postCharset= $this->charset;        $client->format = $this->format;                $request = new AlipayTradePagePayRequest();        $bizParam = array(            'product_code' => 'FAST_INSTANT_TRADE_PAY',            'out_trade_no' => $out_trade_no,            'total_amount' => $total_fee,            'subject'      => $subject,            'body'         => $body,            'seller_id'    => $this->sellerId,        );        $bizContent = json_encode($bizParam, JSON_UNESCAPED_UNICODE);        $request->setBizContent($bizContent);        $request->setNotifyUrl($this->notifyUrl);        $request->setReturnUrl($this->returnUrl);        $response = $client->pageExecute($request);        //指定编码，360、qq浏览器下，浏览器没有设置为自动检测编码，会有问题。        header("Content-type: text/html; charset=utf-8");        echo $response;    }    /**     * JS支付     *      * @return array     */    public function jsPay($out_trade_no, $total_fee, $body, $wx_app = 'APP' , $platform = 'ios')    {        $client = new AopClient;        $client->gatewayUrl = $this->gatewayUrl;        $client->appId = $this->appId;        $client->rsaPrivateKeyFilePath = $this->privateKeyPath;        $client->alipayrsaPublicKey = $this->publicKey;        $client->apiVersion = '1.0';        $client->signType = $this->signType;        $client->postCharset= $this->charset;        $client->format = $this->format;        $request = new AlipayTradeWapPayRequest();        $bizParam = array(            'product_code' => 'QUICK_WAP_PAY',            'seller_id'    => $this->sellerId,            'out_trade_no' => $out_trade_no,            'total_amount' => $total_fee,            'subject'      => $body,            'body'         => $body,        );        $bizContent = json_encode($bizParam, JSON_UNESCAPED_UNICODE);        $request->setBizContent($bizContent);        $request->setNotifyUrl($this->notifyUrl);        $request->setReturnUrl($this->returnUrlM);        $response = $client->pageExecute($request);        header("Content-type: text/html; charset=utf-8");        echo $response;    }    /**     * APP获得支付参数     *      * @return array     */    public function appApi($out_trade_no, $total_fee, $body, $wx_app = 'APP' , $platform = 'ios')    {        $client = new AopClient;        $client->gatewayUrl = $this->gatewayUrl;        $client->appId = $this->appId;        $client->rsaPrivateKeyFilePath = $this->privateKeyPath;        $client->alipayrsaPublicKey = $this->publicKey;        $client->format = $this->format;        $client->charset = $this->charset;        $client->signType = $this->signType;        $request = new AlipayTradeAppPayRequest();        $bizParam = array(            'product_code' => 'QUICK_MSECURITY_PAY',            'seller_id'    => $this->sellerId,            'out_trade_no' => $out_trade_no,            'total_amount' => $total_fee,            'subject'      => $body,            'body'         => $body,        );        $request->setNotifyUrl($this->notifyUrl);        $bizContent = json_encode($bizParam, JSON_UNESCAPED_UNICODE);        $request->setBizContent($bizContent);        $response = $client->sdkExecute($request);        //解析参数，此处返回字符串，APP需要json        parse_str($response, $responseJson);        //私钥        $responseJson['private_key'] = $this->_getPrivateKey();        return Dg_Helper_Common::initReturn(NO_ERROR, NO_ERROR, $responseJson);    }    /**     * 生成支付二维码     *      * @return array     */    public function generateQrCode($out_trade_no, $total_fee, $subject = '缴费', $body = '缴费')    {        $client = new AopClient;        $client->gatewayUrl = $this->gatewayUrl;        $client->appId = $this->appId;        $client->rsaPrivateKeyFilePath = $this->privateKeyPath;        $client->alipayrsaPublicKey = $this->publicKey;        $client->apiVersion = '1.0';        $client->format = $this->format;        $client->postCharset = $this->charset;        $client->signType = $this->signType;        $request = new AlipayTradePrecreateRequest();        $bizParam = array(            'seller_id'    => $this->sellerId,            'out_trade_no' => $out_trade_no,            'total_amount' => $total_fee,            'subject'      => $body,            'body'         => $body,        );        $request->setNotifyUrl($this->notifyUrl);        $bizContent = json_encode($bizParam, JSON_UNESCAPED_UNICODE);        $request->setBizContent($bizContent);        try {            $response = $client->execute($request); //返回的是对象            $response = json_decode(json_encode($response), true);            if ( isset($response['alipay_trade_precreate_response']) && $response['alipay_trade_precreate_response']['code'] == '10000' ) {                return Dg_Helper_Common::initReturn(NO_ERROR, NO_ERROR, $response['alipay_trade_precreate_response']);            } else {                return Dg_Helper_Common::initReturn(ERROR_COMMON , NO_ERROR , $response['alipay_trade_precreate_response']['msg'].' '.$response['alipay_trade_precreate_response']['sub_msg']);            }        } catch (Exception $e) {            return Dg_Helper_Common::initReturn(ERROR_COMMON , NO_ERROR , $e->getMessage());        }    }    /**     * 验证签名     *      * @param  array $data 支付宝返回的参数     * @return bool     */    public function verify($data)    {        if ( $data['seller_id'] != $this->sellerId ) {            return false;        }        if ( $data['app_id'] != $this->appId ) {            return false;        }        $client = new AopClient;        $client->alipayrsaPublicKey = $this->publicKey;        $result = $client->rsaCheckV1($data, '', $this->signType);        return $result;    }    /**     * 获得私钥     *      * @return string     */    private function _getPrivateKey()    {        $privateKey = '';        if ( file_exists($this->privateKeyPath) ) {            $privateKey = file_get_contents($this->privateKeyPath);            $privateKey = str_replace(array('-----BEGIN RSA PRIVATE KEY-----','-----END RSA PRIVATE KEY-----'), '', $privateKey);            $privateKey = str_replace("\r\n", '', $privateKey);        }        return $privateKey;    }}?>