一切尽在代码中，代码附有注释，欢迎大家参考。

<?php class WxpayService { protected $mchid; protected $appid; protected $key; public function __construct($mchid, $appid, $key) { $this->mchid = $mchid; // 微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送 $this->appid = $appid; //公众号APPID 通过微信支付商户资料审核后邮件发送 $this->key = $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 } /** * @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 $notifyUrl 支付结果通知url 不要有问号 * https://mp.weixin.qq.com/ 微信支付-开发配置-测试目录 * 测试目录 http://mp.izhanlue.com/paytest/ 最后需要斜线，(需要精确到二级或三级目录) * @return string */ public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp) { $config = array( 'mch_id' => $this->mchid, 'appid' => $this->appid, 'key' => $this->key, ); $unified = array( 'appid' => $config['appid'], 'attach' => '支付', //商家数据包，原样返回 '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)); /* <xml> <return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg> <appid><![CDATA[wx00e5904efec77699]]></appid> <mch_id><![CDATA[1220647301]]></mch_id> <nonce_str><![CDATA[1LHBROsdmqfXoWQR]]></nonce_str> <sign><![CDATA[ACA7BC8A9164D1FBED06C7DFC13EC839]]></sign> <result_code><![CDATA[SUCCESS]]></result_code> <prepay_id><![CDATA[wx2015032016590503f1bcd9c30421762652]]></prepay_id> <trade_type><![CDATA[JSAPI]]></trade_type> </xml> */ $unifiedOrder = simplexml_load_string($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($unifiedOrder->err_code); /* NOAUTH 商户无此接口权限 NOTENOUGH 余额不足 ORDERPAID 商户订单已支付 ORDERCLOSED 订单已关闭 SYSTEMERROR 系统错误 APPID_NOT_EXIST APPID不存在 MCHID_NOT_EXIST MCHID不存在 APPID_MCHID_NOT_MATCH appid和mch_id不匹配 LACK_PARAMS 缺少参数 OUT_TRADE_NO_USED 商户订单号重复 SIGNERROR 签名错误 XML_FORMAT_ERROR XML格式错误 REQUIRE_POST_METHOD 请使用post方法 POST_DATA_EMPTY post数据为空 NOT_UTF8 编码格式错误 */ } //$unifiedOrder->trade_type 交易类型 调用接口提交的交易类型，取值如下：JSAPI，NATIVE，APP //$unifiedOrder->prepay_id 预支付交易会话标识 微信生成的预支付回话标识，用于后续接口调用中使用，该值有效期为2小时 //$unifiedOrder->code_url 二维码链接 trade_type为NATIVE是有返回，可将该参数值生成二维码展示出来进行扫码支付 $arr = array( "appId" => $config['appid'], "timeStamp" => $timestamp, "nonceStr" => self::createNonceStr(), "package" => "prepay_id=" . $unifiedOrder->prepay_id, "signType" => 'MD5', ); $arr['paySign'] = self::getSign($arr, $config['key']); return $arr; } public function notify() { $config = array( 'mch_id' => $this->mchid, 'appid' => $this->appid, 'key' => $this->key, ); $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; //error_log($postStr, 3, './str.txt'); /* $postStr = '<xml> <appid><![CDATA[wx00e5904efec77699]]></appid> <attach><![CDATA[支付测试]]></attach> <bank_type><![CDATA[CMB_CREDIT]]></bank_type> <cash_fee><![CDATA[1]]></cash_fee> <fee_type><![CDATA[CNY]]></fee_type> <is_subscribe><![CDATA[Y]]></is_subscribe> <mch_id><![CDATA[1220647301]]></mch_id> <nonce_str><![CDATA[a0tZ41phiHm8zfmO]]></nonce_str> <openid><![CDATA[oU3OCt5O46PumN7IE87WcoYZY9r0]]></openid> <out_trade_no><![CDATA[550bf2990c51f]]></out_trade_no> <result_code><![CDATA[SUCCESS]]></result_code> <return_code><![CDATA[SUCCESS]]></return_code> <sign><![CDATA[F6F519B4DD8DB978040F8C866C1E6250]]></sign> <time_end><![CDATA[20150320181606]]></time_end> <total_fee>1</total_fee> <trade_type><![CDATA[JSAPI]]></trade_type> <transaction_id><![CDATA[1008840847201503200034663980]]></transaction_id> </xml>'; */ $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA); if ($postObj === false) { die('parse xml error'); } if ($postObj->return_code != 'SUCCESS') { die($postObj->return_msg); } if ($postObj->result_code != 'SUCCESS') { die($postObj->err_code); } $arr = (array)$postObj; unset($arr['sign']); if (self::getSign($arr, $config['key']) == $postObj->sign) { // $mch_id = $postObj->mch_id; //微信支付分配的商户号 // $appid = $postObj->appid; //微信分配的公众账号ID // $openid = $postObj->openid; //用户在商户appid下的唯一标识 // $transaction_id = $postObj->transaction_id;//微信支付订单号 // $out_trade_no = $postObj->out_trade_no;//商户订单号 // $total_fee = $postObj->total_fee; //订单总金额，单位为分 // $is_subscribe = $postObj->is_subscribe; //用户是否关注公众账号，Y-关注，N-未关注，仅在公众账号类型支付有效 // $attach = $postObj->attach;//商家数据包，原样返回 // $time_end = $postObj->time_end;//支付完成时间 echo '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>'; return $postObj; } } /** * curl get * * @param string $url * @param array $options * @return mixed */ public static function curlGet($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) { $xml = "<xml>"; foreach ($arr as $key => $val) { if (is_numeric($val)) { $xml .= "<" . $key . ">" . $val . "</" . $key . ">"; } else $xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">"; } $xml .= "</xml>"; return $xml; } /** * 例如： * appid： wxd930ea5d5a258f4f * mch_id： 10000100 * device_info： 1000 * Body： test * nonce_str： ibuaiVcKdpRxkhJA * 第一步：对参数按照 key=value 的格式，并按照参数名 ASCII 字典序排序如下： * stringA="appid=wxd930ea5d5a258f4f&body=test&device_info=1000&mch_i * d=10000100&nonce_str=ibuaiVcKdpRxkhJA"; * 第二步：拼接支付密钥： * stringSignTemp="stringA&key=192006250b4c09247ec02edce69f6a2d" * sign=MD5(stringSignTemp).toUpperCase()="9A0A8659F005D6984697E2CA0A9CF3B7" */ public static function getSign($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; } }

以上代码大家都能看得懂吧，有哪里不明白的地方欢迎给我留言，我会在第一时间和大家取得联系的。谢谢大家对查字典教程网的支持。