php实现支付宝当面付（扫码支付）功能

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

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

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='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';
$alipay = new alipayservice($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, $targetcharset) {
    if (!empty($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 (!empty($options)) {
      curl_setopt_array($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;
  }
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。