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【Api】PHP与微信公众号支付,很简单

2022-10-11 21:24:35 150 0

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本文实例讲述了PHP与微信支付，在公众号支付的功能，接入Api是很简单的，初学者总是会想得很麻烦，其实你按照api文档给你的思路那样做就好了，下面给大家讲解一下，供大家参考，具体如下：

编写代码之前会有一系列的支付的配置，这一块可以参考微信文档

效果图如下

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：微信公众平台支付接口调试工具

代码如下：

配置文件与支付

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 = ' //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);
?>

模板文件


 
 
 
 微信支付样例-支付
 
 
 
 

 该笔订单支付金额为元钱

JSAPI文件

protected  $mchid;
 protected $appid;
 protected $appKey;
 protected $apiKey;
 public $data = null;
 public function __construct($mchid, $appid, $appKey,$key)
 {
 $this->mchid = $mchid; // 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 = $key; // 帐户设置-安全设置-API安全-API密钥-设置API密钥
 }
 /**
 * 通过跳转获取用户的openid，跳转流程如下：
 * 1、设置自己需要调回的url及其其他参数，跳转到微信服务器
 * 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code
 * @return 用户的openid
 */
 public function GetOpenid()
 {
 //通过code获得openid
 if (!isset($_GET['code'])){
 //触发微信返回code码
 $scheme = $_SERVER['HTTPS']=='on' ? ' : '
 $baseUrl =  urlencode ($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 = $this->ToUrl params ($urlObj);
 return "".$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 "".$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,
 'm ch _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']);
 $responseXml = self::curlPost(' self::arrayToXml($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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