```php $wx = new WeixinPay();//实例化微信支付控制器 $body = '支付说明' . $param['body'];//支付说明 $out_trade_no = $param['orderCode'];//订单号 $total_fee = $param['money']*100 ;//* 100;//支付金额(乘以100) $notify_url = "***";//回调地址 $order = $wx->getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url);//调用微信支付的方法 if ($order['prepay_id']){//判断返回参数中是否有prepay_id $order1 = $wx->getOrder($order['prepay_id']);//执行二次签名返回参数 return $this->ret('1','',$order1); } else { return $this->ret('1',$order['err_code_des']); } ``` ```php <?php namespace app\api\controller; use think\Controller; use think\Db; class WeixinPay extends Controller{ /* *配置参数 */ public $appid; private $config = array( /* 'appid' => "wxde78356f4441ef1d",微信开放平台上的应用id*/ 'mch_id' => "***", /*微信申请成功之后邮件中的商户id*/ 'api_key' => "***" /*在微信商户平台上自己设定的api密钥 32位*/ ); //获取预支付订单 public function getPrePayOrder($body, $out_trade_no, $total_fee, $notify_url){ $url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; $onoce_str = $this->getRandChar(32); $data["appid"] = $this->appid; $data["body"] =$body; $data["mch_id"] = $this->config['mch_id']; $data["nonce_str"] = $onoce_str; $data["notify_url"] = $notify_url; $data["out_trade_no"] = $out_trade_no; $data["spbill_create_ip"] = $this->get_client_ip(); $data["total_fee"] = $total_fee; $data["trade_type"] = "APP"; $s = $this->getSign($data, false); $data["sign"] = $s; // var_dump($data);die; $xml = $this->arrayToXml($data); $response = $this->postXmlCurl($xml, $url); //将微信返回的结果xml转成数组 return $this->xmlstr_to_array($response); // return xmlToArray($response); } //执行第二次签名，才能返回给客户端使用 public function getOrder($prepayId){ $data["appid"] =$this->appid; $data["noncestr"] = $this->getRandChar(32);; $data["package"] = "Sign=WXPay"; $data["partnerid"] = $this->config['mch_id']; $data["prepayid"] = $prepayId; $data["timestamp"] = time(); $s = $this->getSign($data, false); $data["sign"] = $s; return $data; } /* 生成签名 */ function getSign($Obj) { foreach ($Obj as $k => $v) { $Parameters[strtolower($k)] = $v; } //签名步骤一：按字典序排序参数 ksort($Parameters); $String = $this->formatBizQueryParaMap($Parameters, false); //echo "【string】 =".$String."</br>"; //签名步骤二：在string后加入KEY $String = $String."&key=".$this->config['api_key']; // echo "<textarea style='width: 50%; height: 150px;'>$String</textarea> <br />"; //签名步骤三：MD5加密 $result_ = strtoupper(md5($String)); return $result_; } //获取指定长度的随机字符串 function getRandChar($length){ $str = null; $strPol = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz"; $max = strlen($strPol)-1; for($i=0;$i<$length;$i++){ $str.=$strPol[rand(0,$max)];//rand($min,$max)生成介于min和max两个数之间的一个随机整数 } return $str; } //数组转xml function arrayToXml($arr) { $xml = "<xml>"; foreach ($arr as $key=>$val) { if (is_numeric($val)) { $xml.="<".$key.">".$val."</".$key.">"; } else $xml.="<".$key."><![CDATA[".$val."]]></".$key.">"; } $xml.="</xml>"; return $xml; } //post https请求，CURLOPT_POSTFIELDS xml格式 function postXmlCurl($xml,$url,$second=30) { //初始化curl $ch = curl_init(); //超时时间 curl_setopt($ch,CURLOPT_TIMEOUT,$second); //这里设置代理，如果有的话 //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8'); //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); curl_setopt($ch,CURLOPT_URL, $url); curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,FALSE); //设置header curl_setopt($ch, CURLOPT_HEADER, FALSE); //要求结果为字符串且输出到屏幕上 curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); //post提交方式 curl_setopt($ch, CURLOPT_POST, TRUE); curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); //运行curl $data = curl_exec($ch); //返回结果 if($data) { curl_close($ch); return $data; } else { $error = curl_errno($ch); echo "curl出错，错误码:$error"."<br>"; echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>错误原因查询</a></br>"; curl_close($ch); return false; } } /* 获取当前服务器的IP */ function get_client_ip() { if ($_SERVER['REMOTE_ADDR']) { $cip = $_SERVER['REMOTE_ADDR']; } elseif (getenv("REMOTE_ADDR")) { $cip = getenv("REMOTE_ADDR"); } elseif (getenv("HTTP_CLIENT_IP")) { $cip = getenv("HTTP_CLIENT_IP"); } else { $cip = "unknown"; } return $cip; } //将数组转成uri字符串 function formatBizQueryParaMap($paraMap, $urlencode) { $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v) { if($urlencode) { $v = urlencode($v); } $buff .= strtolower($k) . "=" . $v . "&"; } $reqPar; if (strlen($buff) > 0) { $reqPar = substr($buff, 0, strlen($buff)-1); } return $reqPar; } /** xml转成数组 */ function xmlstr_to_array($xmlstr){//xml字符串转数组 $ob= simplexml_load_string($xmlstr,'SimpleXMLElement', LIBXML_NOCDATA);//将字符串转化为变量 $json = json_encode($ob);//将对象转化为JSON格式的字符串 $configData = json_decode($json, true);//将JSON格式的字符串转化为数组 return $configData; } // function xmlstr_to_array($xmlstr) { // $doc = new DOMDocument(); // $doc->loadXML($xmlstr); // return $this->domnode_to_array($doc->documentElement); // } function domnode_to_array($node) { $output = array(); switch ($node->nodeType) { case XML_CDATA_SECTION_NODE: case XML_TEXT_NODE: $output = trim($node->textContent); break; case XML_ELEMENT_NODE: for ($i=0, $m=$node->childNodes->length; $i<$m; $i++) { $child = $node->childNodes->item($i); $v = $this->domnode_to_array($child); if(isset($child->tagName)) { $t = $child->tagName; if(!isset($output[$t])) { $output[$t] = array(); } $output[$t][] = $v; } elseif($v) { $output = (string) $v; } } if(is_array($output)) { if($node->attributes->length) { $a = array(); foreach($node->attributes as $attrName => $attrNode) { $a[$attrName] = (string) $attrNode->value; } $output['@attributes'] = $a; } foreach ($output as $t => $v) { if(is_array($v) && count($v)==1 && $t!='@attributes') { $output[$t] = $v[0]; } } } break; } return $output; } } ```