``` <?php namespace weixin; class wxpay{ public static $config; /** * 统一下单配置参数 * @param unknown $params * @return unknown|boolean */ public static function getPayMsg($params){ $url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; $nonce_str = self::createNoncestr(); $data = [ 'appid' => self::$config['APPID'], 'mch_id' => self::$config['MCHID'], 'nonce_str' => $nonce_str, 'spbill_create_ip' => self::get_client_ip(), ]; $data = array_merge($data,$params); $sign = self::getSign($data,false); $data["sign"] = $sign; $xml = self::arrayToXml($data); $response = self::postXmlCurl($xml, $url); $response = self::xmlToArray($response); $result = false; if(isset($response['prepay_id'])){ switch ($params['trade_type']){ case 'JSAPI': $result = self::getJsOrder($response['prepay_id']); break; case 'MWEB': $result = isset($response['mweb_url']) ? $response['mweb_url'] : false; break; case 'NATIVE': $result = isset($response['code_url']) ? $response['code_url'] : false; break; case 'APP': $result = self::getAppOrder($response['prepay_id']); break; } } return $result; } /** * 拼接公众号支付所需参数 * @param string $prepayId * @return array */ private static function getJsOrder($prepayId){ $data = [ 'appId' => self::$config['APPID'], 'nonceStr' => self::createNoncestr(), 'package' => "prepay_id=".$prepayId, 'timeStamp' => time().'', 'signType' => 'MD5' ]; $sign = self::getSign($data, false); $data["paySign"] = $sign; return $data; } /** * 拼接App支付所需参数 * @param unknown $prepayId * @return unknown */ private static function getAppOrder($prepayId){ $data["appid"] = self::$config["APPID"]; $data["noncestr"] = self::createNoncestr(); $data["package"] = "Sign=WXPay"; $data["partnerid"] = self::$config['MCHID']; $data["prepayid"] = $prepayId; $data["timestamp"] = time(); $sign = self::getSign($data, false); $data["sign"] = $sign; return $data; } /** * 生成签名 * @param array $Obj * @return string */ public static function getSign($Obj){ $Parameters = array(); foreach ($Obj as $k => $v){ if(strlen($v) > 0){ $Parameters[$k] = $v; } } //签名步骤一：按字典序排序参数 ksort($Parameters); $String = self::formatBizQueryParaMap($Parameters, false); //echo '【string1】'.$String.'</br>'; //签名步骤二：在string后加入KEY $String = $String."&key=".self::$config['APIKEY']; //echo "【string2】".$String."</br>"; //签名步骤三：MD5加密 $String = md5($String); //echo "【string3】 ".$String."</br>"; //签名步骤四：所有字符转为大写 $result_ = strtoupper($String); //echo "【result】 ".$result_."</br>"; return $result_; } /** * 作用：产生随机字符串，不长于32位 */ private static function createNoncestr( $length = 32 ){ $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str =""; for ( $i = 0; $i < $length; $i++ ) { $str.= substr($chars, mt_rand(0, strlen($chars)-1), 1); } return $str; } //数组转xml private static function arrayToXml($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 $xml; } /** * 作用：将xml转为array */ private static function xmlToArray($xml){ //将XML转为array $array_data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); return $array_data; } /** * 作用：以post方式提交xml到对应的接口url */ private static function postXmlCurl($xml,$url,$second=30){ //初始化curl $ch = curl_init(); //设置超时 curl_setopt($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 $data; } } /* 获取当前服务器的IP */ private static function get_client_ip(){ if ($_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 $cip; } /** * 作用：格式化参数，签名过程需要使用 */ private static function formatBizQueryParaMap($paraMap, $urlencode){ $buff = ""; ksort($paraMap); foreach ($paraMap as $k => $v){ if($urlencode){ $v = urlencode($v); } $buff .= $k . "=" . $v . "&"; } $reqPar = ''; if (strlen($buff) > 0){ $reqPar = substr($buff, 0, strlen($buff)-1); } return $reqPar; } } ```