php实现支付宝当面付（扫码支付）功能

发布:smiling　来源: PHP粉丝网　添加日期：2021-09-20 16:02:01　浏览: 评论：0　

网上的很多PHP支付宝支付接入教程都颇为复杂，且需要配置和引入较多的文件，本人通过整理后给出一个单文件版的，希望可以给各位想接入支付宝支付的带来些许帮助和借鉴意义。

扫码支付，指用户打开支付宝钱包中的“扫一扫”功能，扫描商家展示在某收银场景下的二维码并进行支付的模式。该模式适用于线下实体店支付、面对面支付等场景。

运行以下php文件代码即可生成一张付款二维码图片，使用支付宝扫一扫即可付款。

一个PHP文件搞定支付宝系列

一个PHP文件搞定微信支付系列

环境依赖

PHP5.0以上，且需要开启CURL服务、SSL服务。

注意事项

1.文件开头的配置信息必须完善

2.商户私钥需填写对应签名算法类型的私钥，如何生成密钥参考：

2.1 生成RSA密钥

2.2 创建应用

代码

<?php

header('Content-type:text/html; Charset=utf-8');

$appid = 'xxxxx'; //https://open.alipay.com 账户中心->密钥管理->开放平台密钥，填写添加了电脑网站支付的应用的APPID

$notifyUrl = 'http://www.xxx.com/alipay/notify.php';   //付款成功后的异步回调地址

$outTradeNo = uniqid();   //你自己的商品订单号

$payAmount = 0.01;     //付款金额，单位:元

$orderName = '支付测试';  //订单标题

$signType = 'RSA2';    //签名算法类型，支持RSA2和RSA，推荐使用RSA2

//商户私钥，填写对应签名算法类型的私钥，如何生成密钥参考：https://docs.open.alipay.com/291/105971和https://docs.open.alipay.com/200/105310

$saPrivateKey='MIIEpAIBAAKCAQEA1MV+OY6MvGfXPM0MkpjT+FdzGmPOvVmX2wF3gjwQpeHBEUP9jLXhVS32fZ1iXI1e7WUGQ5tvXn28P8190kpOn/c/G5t2CAksUvemvF7uJN/N3Z1HFMdt3omvCd14K05lgcFYz7Z4c+A7ZJF5bPCB6oshjjUmbCY3hibuWzX/1j8AgsoD9lLy1oFqxLj98k5ZrYIhk900gMQs/WJ3A1FC09Dln9fuhBUyjtPHaml+4w+sdkdzxPktxdFrMcI7M7rNEwg25XtST5Z49oFpE84AlXM7+oC9jYvIpTGE00WomsgtakN039ucT/59Bup6pLkO08Rv85UXbqzGTcYAhNHLfQIDAQABAoIBAQCbuPM58s+j8KgB8ty5yiqRPoeaj+O2h4Txn7A02/sfPQvNtCI0w3TpT5twsihULo+EVYTxJCitUn7df2sP5pyGzTEd5njLRtNu4Zvhj+Thjf8grERiu9b4oXI/WRzjLRxzi+uREi40OK+fWi0xgxDCdROY/eNiEdJfV8zpaqsUxG7VdwZIJQ/8d3Mi31OWv30kr9jfEd15DBInGJgSqR+qwrAB4pBSMcW8hL6PYlzoPi1ygceFjRrnbeMG40zt0OUPSexQIgAmFvGqxTl5xo3dFEziGHdfWYsBKZ2M8ubAe+R6LcndxI+o2Hw4TNcC1tDeNMtjw7+h9S5aef5A8uWBAoGBAPxCLWPhUHCYlIXUz0D1SoolZs9WK7Kz1YSWnzqrpegN+foS5/ji93YylGE+KL31TwbnGQLAwknwMX3qTzmkvTovmy8jevXBsCSEFm81q0wG/35e1SKkTXL66RqB2y0xFLdcF3f9s8ZiEclqkYwNSHh0nqzREfIxMMAsj+3n2vHdAoGBANftYkZYrbs4iI/ZcjmBYguYikNfNmrD+Ta6ckOGZqsHfwXJCAz1rF4/XCqVAc9nxuzJR/72qkn9z07uH6qSZCqlZDRkiiKaK2UVqFDB+0abMk/TGHXuMmdvMkyj2jEZxG2rkg0kmg4qYkkg/5tGG1On/2GeZNVPu8JpsFr1pDYhAoGBANr8pCTKC6fDfWP1C3qrtmrY7zhc6RB4d4pjq5UmP5+EypaiZQi2F/dfD1qfuIS3eURXyGmQZtoDDyPtDZvP/ImPnFs+pNbFryD0HfmrEKquhIvyzXoGQknnsgbV5iyEKCTJaII9FxzINAKzZei7+0a+jqUd1kN3Gogp50Sze2ltAoGARaM5Xpaa8RZ6dGocfI9Nn4/Ch5fdZPFvHkdjMoPV+LKiNKtw/Tz+KiclAlasDsfZT+RaY9AJe3NvuHTzoX807swIVR1Xr3EpLaCed+0XrN3AjB34dZAskU87WZw+cjdtMjFzGOoFBSyGJi+OP/WMOp6jo/YBbwoX88tCJROzsgECgYAT8pHHIyPt5Y/5pDb8EDvD3XNES1fBkfZffSoAodsrkeoKgrsKl+9M3rcGX+S9dscyoH0ur3BFTMHtIOOhC5qytt+BhMHIP5mAs4di4u/joQCWQbUyrUggVK5it+6BFgAT+jeB7zTAUtgGpTVFq3kLbV0NZ+XQyEHVlnoJnHYpQg==';

$aliPay = new AlipayService($appid,$returnUrl,$notifyUrl,$saPrivateKey);

$result = $aliPay->doPay($payAmount,$outTradeNo,$orderName,$returnUrl,$notifyUrl);

$result = $result['alipay_trade_precreate_response'];

if($result['code'] && $result['code']=='10000'){

  //生成二维码

  $url = 'http://pan.baidu.com/share/qrcode?w=300&h=300&url='.$result['qr_code'];

  echo "<img src='{$url}' style='width:300px;'><br>";

  echo '二维码内容：'.$result['qr_code'];

}else{

  echo $result['msg'].' : '.$result['sub_msg'];

}

class AlipayService

{

  protected $appId;

  protected $returnUrl;

  protected $notifyUrl;

  //私钥文件路径

  protected $rsaPrivateKeyFilePath;

  //私钥值

  protected $rsaPrivateKey;

  public function __construct($appid, $returnUrl, $notifyUrl,$saPrivateKey)

  {

    $this->appId = $appid;

    $this->returnUrl = $returnUrl;

    $this->notifyUrl = $notifyUrl;

    $this->charset = 'utf8';

    $this->rsaPrivateKey=$saPrivateKey;

  }

  /**

   * 发起订单

   * @param float $totalFee 收款总费用单位元

   * @param string $outTradeNo 唯一的订单号

   * @param string $orderName 订单名称

   * @param string $notifyUrl 支付结果通知url 不要有问号

   * @param string $timestamp 订单发起时间

   * @return array

   */

  public function doPay($totalFee, $outTradeNo, $orderName, $returnUrl,$notifyUrl)

  {

    //请求参数

    $requestConfigs = array(

      'out_trade_no'=>$outTradeNo,

      'total_amount'=>$totalFee, //单位元

      'subject'=>$orderName, //订单标题

    );

    $commonConfigs = array(

      //公共参数

      'app_id' => $this->appId,

      'method' => 'alipay.trade.precreate',       //接口名称

      'format' => 'JSON',

      'charset'=>$this->charset,

      'sign_type'=>'RSA2',

      'timestamp'=>date('Y-m-d H:i:s'),

      'version'=>'1.0',

      'notify_url' => $notifyUrl,

      'biz_content'=>json_encode($requestConfigs),

    );

    $commonConfigs["sign"] = $this->generateSign($commonConfigs, $commonConfigs['sign_type']);

    $result = $this->curlPost('https://openapi.alipay.com/gateway.do',$commonConfigs);

    return json_decode($result,true);

  }

  public function generateSign($params, $signType = "RSA") {

    return $this->sign($this->getSignContent($params), $signType);

  }

  protected function sign($data, $signType = "RSA") {

    $priKey=$this->rsaPrivateKey;

    $res = "-----BEGIN RSA PRIVATE KEY-----\n" .

      wordwrap($priKey, 64, "\n", true) .

      "\n-----END RSA PRIVATE KEY-----";

    ($res) or die('您使用的私钥格式错误，请检查RSA私钥配置');

    if ("RSA2" == $signType) {

      openssl_sign($data, $sign, $res, version_compare(PHP_VERSION,'5.4.0', '<') ? SHA256 : OPENSSL_ALGO_SHA256); //OPENSSL_ALGO_SHA256是php5.4.8以上版本才支持

    } else {

      openssl_sign($data, $sign, $res);

    }

    $sign = base64_encode($sign);

    return $sign;

  }

  /**

   * 校验$value是否非空

   * if not set ,return true;

   *  if is null , return true;

   **/

  protected function checkEmpty($value) {

    if (!isset($value))

      return true;

    if ($value === null)

      return true;

    if (trim($value) === "")

      return true;

    return false;

  }

  public function getSignContent($params) {

    ksort($params);

    $stringToBeSigned = "";

    $i = 0;

    foreach ($params as $k => $v) {

      if (false === $this->checkEmpty($v) && "@" != substr($v, 0, 1)) {

        // 转换成目标字符集

        $v = $this->characet($v, $this->charset);

        if ($i == 0) {

          $stringToBeSigned .= "$k" . "=" . "$v";

        } else {

          $stringToBeSigned .= "&" . "$k" . "=" . "$v";

        }

        $i++;

      }

    }

    unset ($k, $v);

    return $stringToBeSigned;

  }

  /**

   * 转换字符集编码

   * @param $data

   * @param $targetCharset

   * @return string

   */

  function characet($data, $targetCharset) {

    if (!emptyempty($data)) {

      $fileType = $this->charset;

      if (strcasecmp($fileType, $targetCharset) != 0) {

        $data = mb_convert_encoding($data, $targetCharset, $fileType);

        //$data = iconv($fileType, $targetCharset.'//IGNORE', $data);

      }

    }

    return $data;

  }

  public function curlPost($url = '', $postData = '', $options = array())

  {

    if (is_array($postData)) {

      $postData = http_build_query($postData);

    }

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, $url);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

    curl_setopt($ch, CURLOPT_POST, 1);

    curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);

    curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数

    if (!emptyempty($options)) {

      curl_setopt_array($ch, $options);

    }

    //https请求不验证证书和host

    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

    $data = curl_exec($ch);

    curl_close($ch);

    return $data;

  }

}