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<?php
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namespace wxapp\pay;
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/*
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* 小程序微信支付
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*/
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use think\exception\ErrorException;
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class WeixinPay {
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protected $appid;
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protected $mch_id;
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protected $key;
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protected $openid;
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protected $out_trade_no;
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protected $body;
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protected $total_fee;
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protected $notify_url;
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function __construct() {
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$this->appid = config('app_id');
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$this->mch_id = config('wx_mch_id');
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$this->key = config('wx_pay_key');
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}
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public function pay($openid,$out_trade_no,$body,$total_fee,$notify_url) {
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$this->openid = $openid;
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$this->out_trade_no = $out_trade_no;
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$this->body = $body;
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$this->total_fee = $total_fee;
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$this->notify_url = $notify_url;
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//统一下单接口
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$return = $this->weixinapp();
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return $return;
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}
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//统一下单接口
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protected function unifiedorder() {
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$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
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$parameters = array(
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'appid' => $this->appid, //小程序ID
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'mch_id' => $this->mch_id, //商户号
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'nonce_str' => $this->createNoncestr(), //随机字符串
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'body' => $this->body,
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'out_trade_no'=> $this->out_trade_no,
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'total_fee' => $this->total_fee*100,
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'spbill_create_ip' => get_client_ip(0,true),
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'notify_url' => $this->notify_url,
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'openid' => $this->openid, //用户id
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'trade_type' => 'JSAPI'//交易类型
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);
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//统一下单签名
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$parameters['sign'] = $this->getSign($parameters);
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$xmlData = $this->arrayToXml($parameters);
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$return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
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return $return;
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}
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private static function postXmlCurl($xml, $url, $second = 30)
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{
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$ch = curl_init();
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//设置超时
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curl_setopt($ch, CURLOPT_TIMEOUT, $second);
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curl_setopt($ch, CURLOPT_URL, $url);
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curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
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curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
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//设置header
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curl_setopt($ch, CURLOPT_HEADER, FALSE);
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//要求结果为字符串且输出到屏幕上
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
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//post提交方式
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curl_setopt($ch, CURLOPT_POST, TRUE);
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curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
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curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
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curl_setopt($ch, CURLOPT_TIMEOUT, 40);
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set_time_limit(0);
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//运行curl
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$data = curl_exec($ch);
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//返回结果
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if ($data) {
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curl_close($ch);
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return $data;
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} else {
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$error = curl_errno($ch);
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curl_close($ch);
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throw new ErrorException("curl出错，错误码:$error");
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}
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}
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//数组转换成xml
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private function arrayToXml($arr) {
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$xml = "<root>";
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foreach ($arr as $key => $val) {
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if (is_array($val)) {
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$xml .= "<" . $key . ">" . $this->arrayToXml($val) . "</" . $key . ">";
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} else {
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$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
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}
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}
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$xml .= "</root>";
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return $xml;
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}
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//xml转换成数组
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public function xmlToArray($xml) {
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//禁止引用外部xml实体
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libxml_disable_entity_loader(true);
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$xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
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$val = json_decode(json_encode($xmlstring), true);
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return $val;
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}
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//微信小程序接口
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private function weixinapp() {
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//统一下单接口
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$unifiedorder = $this->unifiedorder();
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if(isset($unifiedorder['return_code'])&&$unifiedorder['return_code']=='FAIL'){
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return $unifiedorder;
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}
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$parameters = array(
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'appId' => $this->appid, //小程序ID
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'timeStamp' => '' . time() . '', //时间戳
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'nonceStr' => $this->createNoncestr(), //随机串
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'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包
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'signType' => 'MD5'//签名方式
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);
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//签名
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$parameters['paySign'] = $this->getSign($parameters);
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return $parameters;
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}
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//作用：产生随机字符串，不长于32位
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private function createNoncestr($length = 32) {
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$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
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$str = "";
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for ($i = 0; $i < $length; $i++) {
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$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
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}
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return $str;
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}
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//作用：生成签名
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public function getSign($Obj) {
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foreach ($Obj as $k => $v) {
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$Parameters[$k] = $v;
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}
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//签名步骤一：按字典序排序参数
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ksort($Parameters);
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$String = $this->formatBizQueryParaMap($Parameters, false);
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//签名步骤二：在string后加入KEY
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$String = $String . "&key=" . $this->key;
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//签名步骤三：MD5加密
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$String = md5($String);
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//签名步骤四：所有字符转为大写
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$result_ = strtoupper($String);
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return $result_;
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}
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///作用：格式化参数，签名过程需要使用
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private function formatBizQueryParaMap($paraMap, $urlencode) {
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$buff = "";
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ksort($paraMap);
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foreach ($paraMap as $k => $v) {
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if ($urlencode) {
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$v = urlencode($v);
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}
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$buff .= $k . "=" . $v . "&";
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}
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$reqPar='';
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if (strlen($buff) > 0) {
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$reqPar = substr($buff, 0, strlen($buff) - 1);
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}
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return $reqPar;
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}
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} |
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\ No newline at end of file |
...
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