php微信支付之公众号支付功能

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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:

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:

//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);
?>

微信支付样例-支付
该笔订单支付金额为

立即支付
public function __construct($mchid,$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,$totalFee,$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_POST,CURLOPT_POSTFIELDS,$postData);
curl_setopt($ch,30); //设置cURL允许执行的最长秒数
if (!empty($options)) {
curl_setopt_array($ch,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 . "</" . $key . ">";
} else
$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $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,strlen($buff) - 1);
}
return $reqPar;
}
}
?>

github

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持编程之家。

原文链接:https://www.f2er.com/php/15991.html

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