網上的很多PHP支付寶支付接入教程都頗為復雜，且需要配置和引入較多的文件，本人通過整理后給出一個單文件版的，希望可以給各位想接入支付寶支付的帶來些許幫助和借鑒意義。
?php
header('Content-type:text/html; Charset=utf-8');
$appid = 'xxxxx'; //https://open.alipay.com 賬戶中心->密鑰管理->開放平臺密鑰，填寫添加了電腦網站支付的應用的APPID
$returnUrl = 'http://www.xxx.com/alipay/return.php'; //付款成功后的同步回調地址
$notifyUrl = 'http://www.xxx.com/alipay/notify.php'; //付款成功后的異步回調地址
$outTradeNo = uniqid(); //你自己的商品訂單號
$payAmount = 0.01; //付款金額，單位:元
$orderName = '支付測試'; //訂單標題
$signType = 'RSA2'; //簽名算法類型，支持RSA2和RSA，推薦使用RSA2
//商戶私鑰，填寫對應簽名算法類型的私鑰，如何生成密鑰參考：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);
$sHtml = $aliPay->doPay($payAmount,$outTradeNo,$orderName,$returnUrl,$notifyUrl);
echo $sHtml;
class AlipayService
{
protected $appId;
protected $returnUrl;
protected $notifyUrl;
protected $charset;
//私鑰值
protected $rsaPrivateKey;
public function __construct($appid, $returnUrl, $notifyUrl,$saPrivateKey)
{
$this->appId = $appid;
$this->returnUrl = $returnUrl;
$this->notifyUrl = $notifyUrl;
$this->charset = 'utf8';
$this->rsaPrivateKey=$saPrivateKey;
}
/**
* 發起訂單
* @param float $totalFee 收款總費用 單位元
* @param string $outTradeNo 唯一的訂單號
* @param string $orderName 訂單名稱
* @param string $notifyUrl 支付結果通知url 不要有問號
* @param string $timestamp 訂單發起時間
* @return array
*/
public function doPay($totalFee, $outTradeNo, $orderName, $returnUrl,$notifyUrl)
{
//請求參數
$requestConfigs = array(
'out_trade_no'=>$outTradeNo,
'product_code'=>'FAST_INSTANT_TRADE_PAY',
'total_amount'=>$totalFee, //單位 元
'subject'=>$orderName, //訂單標題
);
$commonConfigs = array(
//公共參數
'app_id' => $this->appId,
'method' => 'alipay.trade.page.pay', //接口名稱
'format' => 'JSON',
'return_url' => $returnUrl,
'charset'=>$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']);
return $this->buildRequestForm($commonConfigs);
}
/**
* 建立請求，以表單HTML形式構造（默認）
* @param $para_temp 請求參數數組
* @return 提交表單HTML文本
*/
protected function buildRequestForm($para_temp) {
$sHtml = "form id='alipaysubmit' name='alipaysubmit' action='https://openapi.alipay.com/gateway.do?charset=".$this->charset."' method='POST'>";
while (list ($key, $val) = each ($para_temp)) {
if (false === $this->checkEmpty($val)) {
$val = str_replace("'","apos;",$val);
$sHtml.= "input type='hidden' name='".$key."' value='".$val."'/>";
}
}
//submit按鈕控件請不要含有name屬性
$sHtml = $sHtml."input type='submit' value='ok' style='display:none;''>/form>";
$sHtml = $sHtml."script>document.forms['alipaysubmit'].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('您使用的私鑰格式錯誤，請檢查RSA私鑰配置');
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 $sign;
}
/**
* 校驗$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)) {
// 轉換成目標字符集
$v = $this->characet($v, $this->charset);
if ($i == 0) {
$stringToBeSigned .= "$k" . "=" . "$v";
} else {
$stringToBeSigned .= "" . "$k" . "=" . "$v";
}
$i++;
}
}
unset ($k, $v);
return $stringToBeSigned;
}
/**
* 轉換字符集編碼
* @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;
}
}
