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php微信支付之公众号支付功能

程序员文章站 2023-12-09 21:24:57
网上的很多php微信扫码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微信扫码支付的带来些许帮助和借鉴意义。...

网上的很多php微信扫码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微信扫码支付的带来些许帮助和借鉴意义。

将该文件放到你的授权目录下,并在微信里访问这个文件,即可看到演示效果。效果如下:

php微信支付之公众号支付功能 php微信支付之公众号支付功能

需要注意的事项:

1.该文件需放到支付授权目录下,可以在微信支付商户平台->产品中心->开发配置中设置。
2.如提示签名错误可以通过微信支付签名验证工具进行验证:

代码如下:

<?php
header('content-type:text/html; charset=utf-8');
$mchid = 'xxxxx';   //微信支付商户号 partnerid 通过微信支付商户资料审核后邮件发送
$appid = 'xxxxx'; //微信支付申请对应的公众号的appid
$appkey = 'xxxxx'; //微信支付申请对应的公众号的app key
$apikey = 'xxxxx'; //https://pay.weixin.qq.com 帐户设置-安全设置-api安全-api密钥-设置api密钥

//①、获取用户openid
$wxpay = new wxpayservice($mchid,$appid,$appkey,$apikey);
$openid = $wxpay->getopenid();  //获取openid
if(!$openid) exit('获取openid失败');
//②、统一下单
$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
$notifyurl = 'https://www.xxx.com/wx/';  //付款成功后的回调地址(不要有问号)
$paytime = time();  //付款时间
$jsapiparameters = $wxpay->createjsbizpackage($openid,$payamount,$outtradeno,$ordername,$notifyurl,$paytime);
$jsapiparameters = json_encode($jsapiparameters);
?>
 <html>
 <head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1"/>
  <title>微信支付样例-支付</title>
  <script type="text/javascript">
   //调用微信js api 支付
   function jsapicall()
   {
    weixinjsbridge.invoke(
     'getbrandwcpayrequest',
     <?php echo $jsapiparameters; ?>,
     function(res){
      weixinjsbridge.log(res.err_msg);
      alert(res.err_code+res.err_desc+res.err_msg);
     }
    );
   }
   function callpay()
   {
    if (typeof weixinjsbridge == "undefined"){
     if( document.addeventlistener ){
      document.addeventlistener('weixinjsbridgeready', jsapicall, false);
     }else if (document.attachevent){
      document.attachevent('weixinjsbridgeready', jsapicall);
      document.attachevent('onweixinjsbridgeready', jsapicall);
     }
    }else{
     jsapicall();
    }
   }
  </script>
 </head>
 <body>
 <br/>
 <font color="#9acd32"><b>该笔订单支付金额为<span style="color:#f00;font-size:50px"><?php echo $payamount?>元</span>钱</b></font><br/><br/>
 <div align="center">
  <button style="width:210px; height:50px; border-radius: 15px;background-color:#fe6714; border:0px #fe6714 solid; cursor: pointer; color:white; font-size:16px;" type="button" onclick="callpay()" >立即支付</button>
 </div>
 </body>
 </html>
<?php
class wxpayservice
{
 protected $mchid;
 protected $appid;
 protected $appkey;
 protected $apikey;
 public $data = null;

 public function __construct($mchid, $appid, $appkey,$key)
 {
  $this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号
  $this->appid = $appid; //微信支付申请对应的公众号的appid
  $this->appkey = $appkey; //微信支付申请对应的公众号的app key
  $this->apikey = $key; //https://pay.weixin.qq.com 帐户设置-安全设置-api安全-api密钥-设置api密钥
 }

 /**
  * 通过跳转获取用户的openid,跳转流程如下:
  * 1、设置自己需要调回的url及其其他参数,跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize
  * 2、微信服务处理完成之后会跳转回用户redirect_uri地址,此时会带上一些参数,如:code
  * @return 用户的openid
  */
 public function getopenid()
 {
  //通过code获得openid
  if (!isset($_get['code'])){
   //触发微信返回code码
   $scheme = $_server['https']=='on' ? 'https://' : 'http://';
   $baseurl = urlencode($scheme.$_server['http_host'].$_server['php_self'].$_server['query_string']);
   $url = $this->__createoauthurlforcode($baseurl);
   header("location: $url");
   exit();
  } else {
   //获取code码,以获取openid
   $code = $_get['code'];
   $openid = $this->getopenidfrommp($code);
   return $openid;
  }
 }

 /**
  * 通过code从工作平台获取openid机器access_token
  * @param string $code 微信跳转回来带上的code
  * @return openid
  */
 public function getopenidfrommp($code)
 {
  $url = $this->__createoauthurlforopenid($code);
  $res = self::curlget($url);
  //取出openid
  $data = json_decode($res,true);
  $this->data = $data;
  $openid = $data['openid'];
  return $openid;
 }

 /**
  * 构造获取open和access_toke的url地址
  * @param string $code,微信跳转带回的code
  * @return 请求的url
  */
 private function __createoauthurlforopenid($code)
 {
  $urlobj["appid"] = $this->appid;
  $urlobj["secret"] = $this->appkey;
  $urlobj["code"] = $code;
  $urlobj["grant_type"] = "authorization_code";
  $bizstring = $this->tourlparams($urlobj);
  return "https://api.weixin.qq.com/sns/oauth2/access_token?".$bizstring;
 }

 /**
  * 构造获取code的url连接
  * @param string $redirecturl 微信服务器回跳的url,需要url编码
  * @return 返回构造好的url
  */
 private function __createoauthurlforcode($redirecturl)
 {
  $urlobj["appid"] = $this->appid;
  $urlobj["redirect_uri"] = "$redirecturl";
  $urlobj["response_type"] = "code";
  $urlobj["scope"] = "snsapi_base";
  $urlobj["state"] = "state"."#wechat_redirect";
  $bizstring = $this->tourlparams($urlobj);
  return "https://open.weixin.qq.com/connect/oauth2/authorize?".$bizstring;
 }

 /**
  * 拼接签名字符串
  * @param array $urlobj
  * @return 返回已经拼接好的字符串
  */
 private function tourlparams($urlobj)
 {
  $buff = "";
  foreach ($urlobj as $k => $v)
  {
   if($k != "sign") $buff .= $k . "=" . $v . "&";
  }
  $buff = trim($buff, "&");
  return $buff;
 }

 /**
  * 统一下单
  * @param string $openid 调用【网页授权获取用户信息】接口获取到用户在该公众号下的openid
  * @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 $timestamp 支付时间
  * @return string
  */
 public function createjsbizpackage($openid, $totalfee, $outtradeno, $ordername, $notifyurl, $timestamp)
 {
  $config = array(
   'mch_id' => $this->mchid,
   'appid' => $this->appid,
   'key' => $this->apikey,
  );
  $ordername = iconv('gbk','utf-8',$ordername);
  $unified = array(
   'appid' => $config['appid'],
   'attach' => 'pay',    //商家数据包,原样返回,如果填写中文,请注意转换为utf-8
   'body' => $ordername,
   'mch_id' => $config['mch_id'],
   'nonce_str' => self::createnoncestr(),
   'notify_url' => $notifyurl,
   'openid' => $openid,   //rade_type=jsapi,此参数必传
   'out_trade_no' => $outtradeno,
   'spbill_create_ip' => '127.0.0.1',
   'total_fee' => intval($totalfee * 100),  //单位 转为分
   'trade_type' => 'jsapi',
  );
  $unified['sign'] = self::getsign($unified, $config['key']);
  $responsexml = self::curlpost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arraytoxml($unified));
  $unifiedorder = simplexml_load_string($responsexml, 'simplexmlelement', libxml_nocdata);
  if ($unifiedorder === false) {
   die('parse xml error');
  }
  if ($unifiedorder->return_code != 'success') {
   die($unifiedorder->return_msg);
  }
  if ($unifiedorder->result_code != 'success') {
   die($unifiedorder->err_code);
  }
  $arr = array(
   "appid" => $config['appid'],
   "timestamp" => "$timestamp",  //这里是字符串的时间戳,不是int,所以需加引号
   "noncestr" => self::createnoncestr(),
   "package" => "prepay_id=" . $unifiedorder->prepay_id,
   "signtype" => 'md5',
  );
  $arr['paysign'] = self::getsign($arr, $config['key']);
  return $arr;
 }

 public static function curlget($url = '', $options = array())
 {
  $ch = curl_init($url);
  curl_setopt($ch, curlopt_returntransfer, 1);
  curl_setopt($ch, curlopt_timeout, 30);
  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;
 }

 public static 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;
 }

 public static function createnoncestr($length = 16)
 {
  $chars = 'abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz0123456789';
  $str = '';
  for ($i = 0; $i < $length; $i++) {
   $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
  }
  return $str;
 }
 public static function arraytoxml($arr)
 {
  $xml = "<xml>";
  foreach ($arr as $key => $val) {
   if (is_numeric($val)) {
    $xml .= "<" . $key . ">" . $val . "</" . $key . ">";
   } else
    $xml .= "<" . $key . "><![cdata[" . $val . "]]></" . $key . ">";
  }
  $xml .= "</xml>";
  file_put_contents('1.txt',$xml);
  return $xml;
 }

 public static function getsign($params, $key)
 {
  ksort($params, sort_string);
  $unsignparastring = self::formatqueryparamap($params, false);
  $signstr = strtoupper(md5($unsignparastring . "&key=" . $key));
  return $signstr;
 }
 protected static function formatqueryparamap($paramap, $urlencode = false)
 {
  $buff = "";
  ksort($paramap);
  foreach ($paramap as $k => $v) {
   if (null != $v && "null" != $v) {
    if ($urlencode) {
     $v = urlencode($v);
    }
    $buff .= $k . "=" . $v . "&";
   }
  }
  $reqpar = '';
  if (strlen($buff) > 0) {
   $reqpar = substr($buff, 0, strlen($buff) - 1);
  }
  return $reqpar;
 }
}
?>

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