本篇文章给大家分享的内容是关于用一个PHP文件搞定支付宝之电脑网站支付，有需要的朋友可以参考一下
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。
一个PHP文件搞定支付宝系列：https://github.com/dedemao/alipay
一个PHP文件搞定微信支付系列：https://github.com/dedemao/weixinPay
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 https://docs.open.alipay.com/291/105971
2.2 https://docs.open.alipay.com/200/105310
代码

<?phpheader(&#39;Content-type:text/html; Charset=utf-8&#39;);$appid = &#39;xxxxx&#39;;  //https://open.alipay.com 账户中心->密钥管理->开放平台密钥，填写添加了电脑网站支付的应用的APPID$returnUrl = &#39;http://www.xxx.com/alipay/return.php&#39;;     //付款成功后的同步回调地址$notifyUrl = &#39;http://www.xxx.com/alipay/notify.php&#39;;     //付款成功后的异步回调地址$outTradeNo = uniqid();     //你自己的商品订单号$payAmount = 0.01;          //付款金额，单位:元$orderName = &#39;支付测试&#39;;    //订单标题$signType = &#39;RSA2&#39;;       //签名算法类型，支持RSA2和RSA，推荐使用RSA2//商户私钥，填写对应签名算法类型的私钥，如何生成密钥参考：https://docs.open.alipay.com/291/105971和https://docs.open.alipay.com/200/105310$saPrivateKey=&#39;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&#39;;$aliPay = new AlipayService($appid,$returnUrl,$notifyUrl,$saPrivateKey);$sHtml = $aliPay->doPay($payAmount,$outTradeNo,$orderName,$returnUrl,$notifyUrl);echo $sHtml;class AlipayService{
    protected $appId;    protected $returnUrl;    protected $notifyUrl;    protected $charset;    //私钥值
    protected $rsaPrivateKey;    public function __construct($appid, $returnUrl, $notifyUrl,$saPrivateKey)
    {
        $this->appId = $appid;        $this->returnUrl = $returnUrl;        $this->notifyUrl = $notifyUrl;        $this->charset = &#39;utf8&#39;;        $this->rsaPrivateKey=$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
        $requestConfigs = array(            &#39;out_trade_no&#39;=>$outTradeNo,            &#39;product_code&#39;=>&#39;FAST_INSTANT_TRADE_PAY&#39;,            &#39;total_amount&#39;=>$totalFee, //单位 元
            &#39;subject&#39;=>$orderName,  //订单标题
        );        $commonConfigs = array(            //公共参数
            &#39;app_id&#39; => $this->appId,            &#39;method&#39; => &#39;alipay.trade.page.pay&#39;,             //接口名称
            &#39;format&#39; => &#39;JSON&#39;,            &#39;return_url&#39; => $returnUrl,            &#39;charset&#39;=>$this->charset,            &#39;sign_type&#39;=>&#39;RSA2&#39;,            &#39;timestamp&#39;=>date(&#39;Y-m-d H:i:s&#39;),            &#39;version&#39;=>&#39;1.0&#39;,            &#39;notify_url&#39; => $notifyUrl,            &#39;biz_content&#39;=>json_encode($requestConfigs),
        );        $commonConfigs["sign"] = $this->generateSign($commonConfigs, $commonConfigs[&#39;sign_type&#39;]);        return $this->buildRequestForm($commonConfigs);
    }    /**
     * 建立请求，以表单HTML形式构造（默认）
     * @param $para_temp 请求参数数组
     * @return 提交表单HTML文本
     */
    protected function buildRequestForm($para_temp) {

        $sHtml = "<form id=&#39;alipaysubmit&#39; name=&#39;alipaysubmit&#39; action=&#39;https://openapi.alipay.com/gateway.do?charset=".$this->charset."&#39; method=&#39;POST&#39;>";        while (list ($key, $val) = each ($para_temp)) {            if (false === $this->checkEmpty($val)) {                $val = str_replace("&#39;","&apos;",$val);                $sHtml.= "<input type=&#39;hidden&#39; name=&#39;".$key."&#39; value=&#39;".$val."&#39;/>";
            }
        }        //submit按钮控件请不要含有name属性
        $sHtml = $sHtml."<input type=&#39;submit&#39; value=&#39;ok&#39; style=&#39;display:none;&#39;&#39;></form>";        $sHtml = $sHtml."<script>document.forms[&#39;alipaysubmit&#39;].submit();</script>";        return $sHtml;
    }    public function generateSign($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(&#39;您使用的私钥格式错误，请检查RSA私钥配置&#39;);        if ("RSA2" == $signType) {
            openssl_sign($data, $sign, $res, version_compare(PHP_VERSION,&#39;5.4.0&#39;, &#39;<&#39;) ? SHA256 : OPENSSL_ALGO_SHA256); //OPENSSL_ALGO_SHA256是php5.4.8以上版本才支持
        } else {
            openssl_sign($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.&#39;//IGNORE&#39;, $data);
            }
        }        return $data;
    }
}
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