PHP WeChat payment official account payment function

This article mainly introduces the public account payment function of PHP WeChat payment in detail. It has a certain reference value. Interested friends can refer to

There are many PHP WeChat scan code payment on the Internet. The access tutorials are quite complicated and require configuration and introduction of many files. I have sorted them out and provided a single-file version. I hope it can bring some help and reference to those who want to access WeChat scan code payment.

Put the file in your authorized directory and access the file in WeChat to see the demonstration effect. The effect is as follows:

Things to note:

1. The file needs to be placed in the payment authorization directory. It can be set in WeChat Pay Merchant Platform->Product Center->Development Configuration.
2. If a signature error is prompted, you can verify it through the WeChat payment signature verification tool: WeChat public platform payment interface debugging tool

The code is as follows:

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); ?>       
  
 该笔订单支付金额为元钱

 
 立即支付 
   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) { $xml = ""; foreach ($arr as $key => $val) { if (is_numeric($val)) { $xml .= "<" . $key . ">" . $val . ""; } else $xml .= "<" . $key . ">"; } $xml .= ""; file_put_contents('1.txt',$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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