微信 之jsapi实现支付
一、微信公众号号后台支付配置
附微信支付参考文档：https://pay.weixin.qq.com/wiki/doc/api/index.html
二、微信支付类封装
该类可以实现付款码支付、JSAPI支付、Native支付
<?php /** * Created by PhpStorm. * User: Administrator * Date: 2019/2/16 0016 * Time: 下午 4:04 */ class Wxpay { const TRADETYPE_JSAPI = 'JSAPI', TRADETYPE_NATIVE = 'NATIVE', TRADETYPE_APP = 'APP'; const URL_UNIFIEDORDER = "https://api.mch.weixin.qq.com/pay/unifiedorder"; const URL_ORDERQUERY = "https://api.mch.weixin.qq.com/pay/orderquery"; const URL_CLOSEORDER = 'https://api.mch.weixin.qq.com/pay/closeorder'; const URL_REFUND = 'https://api.mch.weixin.qq.com/secapi/pay/refund'; const URL_REFUNDQUERY = 'https://api.mch.weixin.qq.com/pay/refundquery'; const URL_DOWNLOADBILL = 'https://api.mch.weixin.qq.com/pay/downloadbill'; const URL_REPORT = 'https://api.mch.weixin.qq.com/payitil/report'; const URL_SHORTURL = 'https://api.mch.weixin.qq.com/tools/shorturl'; const URL_MICROPAY = 'https://api.mch.weixin.qq.com/pay/micropay'; /** * 错误信息 */ public $error = null; /** * 错误信息XML */ public $errorXML = null; /** * 微信支付配置数组 * appid 公众账号appid * mch_id 商户号 * apikey 加密key * appsecret 公众号appsecret * sslcertPath 证书路径(apiclient_cert.pem) * sslkeyPath 密钥路径(apiclient_key.pem) */ private $_config; /** * @param $config 微信支付配置数组 */ public function __construct($config) { $this->_config = $config; } /** * JSAPI获取prepay_id * @param $body * @param $out_trade_no * @param $total_fee * @param $notify_url * @param $openid * @return null */ public function getPrepayId($body, $out_trade_no, $total_fee, $notify_url, $openid) { $data = array(); $data["nonce_str"] = $this->get_nonce_string(); $data["body"] = $body; $data["out_trade_no"] = $out_trade_no; $data["total_fee"] = $total_fee; $data["spbill_create_ip"] = $_SERVER["REMOTE_ADDR"]; $data["notify_url"] = $notify_url; $data["trade_type"] = self::TRADETYPE_JSAPI; $data["openid"] = $openid; $result = $this->unifiedOrder($data); if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") { return $result["prepay_id"]; } else { $this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"]; $this->errorXML = $this->array2xml($result); return null; } } private function get_nonce_string() { return substr(str_shuffle("abcdefghijklmnopqrstuvwxyz0123456789"), 0, 32); } /** * 统一下单接口 */ public function unifiedOrder($params) { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["device_info"] = (isset($params['device_info']) && trim($params['device_info']) != '') ? $params['device_info'] : null; $data["nonce_str"] = $this->get_nonce_string(); $data["body"] = $params['body']; $data["detail"] = isset($params['detail']) ? $params['detail'] : null;//optional $data["attach"] = isset($params['attach']) ? $params['attach'] : null;//optional $data["out_trade_no"] = isset($params['out_trade_no']) ? $params['out_trade_no'] : null; $data["fee_type"] = isset($params['fee_type']) ? $params['fee_type'] : 'CNY'; $data["total_fee"] = $params['total_fee']; $data["spbill_create_ip"] = $params['spbill_create_ip']; $data["time_start"] = isset($params['time_start']) ? $params['time_start'] : null;//optional $data["time_expire"] = isset($params['time_expire']) ? $params['time_expire'] : null;//optional $data["goods_tag"] = isset($params['goods_tag']) ? $params['goods_tag'] : null; $data["notify_url"] = $params['notify_url']; $data["trade_type"] = $params['trade_type']; $data["product_id"] = isset($params['product_id']) ? $params['product_id'] : null;//required when trade_type = NATIVE $data["openid"] = isset($params['openid']) ? $params['openid'] : null;//required when trade_type = JSAPI $result = $this->post(self::URL_UNIFIEDORDER, $data); return $result; } private function post($url, $data, $cert = false) { $data["sign"] = $this->sign($data); $xml = $this->array2xml($data); $ch = curl_init(); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_POSTFIELDS, $xml); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); curl_setopt($ch, CURLOPT_URL, $url); if ($cert == true) { //使用证书：cert 与 key 分别属于两个.pem文件 curl_setopt($ch, CURLOPT_SSLCERTTYPE, 'PEM'); curl_setopt($ch, CURLOPT_SSLCERT, $this->_config['sslcertPath']); curl_setopt($ch, CURLOPT_SSLKEYTYPE, 'PEM'); curl_setopt($ch, CURLOPT_SSLKEY, $this->_config['sslkeyPath']); } $content = curl_exec($ch); $array = $this->xml2array($content); return $array; } /** * 数据签名 * @param $data * @return string */ private function sign($data) { ksort($data); $string1 = ""; foreach ($data as $k => $v) { if ($v && trim($v) != '') { $string1 .= "$k=$v&"; } } $stringSignTemp = $string1 . "key=" . $this->_config["apikey"]; $sign = strtoupper(md5($stringSignTemp)); return $sign; } private function array2xml($array) { $xml = "<xml>" . PHP_EOL; foreach ($array as $k => $v) { if ($v && trim($v) != '') $xml .= "<$k><![CDATA[$v]]></$k>" . PHP_EOL; } $xml .= "</xml>"; return $xml; } private function xml2array($xml) { $array = array(); $tmp = null; try { $tmp = (array)simplexml_load_string($xml); } catch (Exception $e) { } if ($tmp && is_array($tmp)) { foreach ($tmp as $k => $v) { $array[$k] = (string)$v; } } return $array; } /** * 扫码支付(模式二)获取支付二维码 * @param $body * @param $out_trade_no * @param $total_fee * @param $notify_url * @param $product_id * @return null */ public function getCodeUrl($body, $out_trade_no, $total_fee, $notify_url, $product_id) { $data = array(); $data["nonce_str"] = $this->get_nonce_string(); $data["body"] = $body; $data["out_trade_no"] = $out_trade_no; $data["total_fee"] = $total_fee; $data["spbill_create_ip"] = $_SERVER["SERVER_ADDR"]; $data["notify_url"] = $notify_url; $data["trade_type"] = self::TRADETYPE_NATIVE; $data["product_id"] = $product_id; $result = $this->unifiedOrder($data); if ($result["return_code"] == "SUCCESS" && $result["result_code"] == "SUCCESS") { return $result["code_url"]; } else { $this->error = $result["return_code"] == "SUCCESS" ? $result["err_code_des"] : $result["return_msg"]; return null; } } /** * 查询订单 * @param $transaction_id * @param $out_trade_no * @return array */ public function orderQuery($transaction_id, $out_trade_no) { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["transaction_id"] = $transaction_id; $data["out_trade_no"] = $out_trade_no; $data["nonce_str"] = $this->get_nonce_string(); $result = $this->post(self::URL_ORDERQUERY, $data); return $result; } /** * 关闭订单 * @param $out_trade_no * @return array */ public function closeOrder($out_trade_no) { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["out_trade_no"] = $out_trade_no; $data["nonce_str"] = $this->get_nonce_string(); $result = $this->post(self::URL_CLOSEORDER, $data); return $result; } /** * 申请退款 - 使用商户订单号 * @param $out_trade_no 商户订单号 * @param $out_refund_no 退款单号 * @param $total_fee 总金额（单位：分） * @param $refund_fee 退款金额（单位：分） * @param $op_user_id 操作员账号 * @return array */ public function refund($out_trade_no, $out_refund_no, $total_fee, $refund_fee, $op_user_id) { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["nonce_str"] = $this->get_nonce_string(); $data["out_trade_no"] = $out_trade_no; $data["out_refund_no"] = $out_refund_no; $data["total_fee"] = $total_fee; $data["refund_fee"] = $refund_fee; $data["op_user_id"] = $op_user_id; $result = $this->post(self::URL_REFUND, $data, true); return $result; } /** * 申请退款 - 使用微信订单号 * @param $out_trade_no 商户订单号 * @param $out_refund_no 退款单号 * @param $total_fee 总金额（单位：分） * @param $refund_fee 退款金额（单位：分） * @param $op_user_id 操作员账号 * @return array */ public function refundByTransId($transaction_id, $out_refund_no, $total_fee, $refund_fee, $op_user_id) { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["nonce_str"] = $this->get_nonce_string(); $data["transaction_id"] = $transaction_id; $data["out_refund_no"] = $out_refund_no; $data["total_fee"] = $total_fee; $data["refund_fee"] = $refund_fee; $data["op_user_id"] = $op_user_id; $result = $this->post(self::URL_REFUND, $data, true); return $result; } /** * 下载对账单 * @param $bill_date 下载对账单的日期，格式：20140603 * @param $bill_type 类型 * @return array */ public function downloadBill($bill_date, $bill_type = 'ALL') { $data = array(); $data["appid"] = $this->_config["appid"]; $data["mch_id"] = $this->_config["mch_id"]; $data["bill_date"] = $bill_date; $data["bill_type"] = $bill_type; $data["nonce_str"] = $this->get_nonce_string(); $result = $this->post(self::URL_DOWNLOADBILL, $data); return $result; } /** * 获取js支付使用的第二个参数 */ public function get_package($prepay_id) { $data = array(); $data["appId"] = $this->_config["appid"]; $data["timeStamp"] = time(); $data["nonceStr"] = $this->get_nonce_string(); $data["package"] = "prepay_id=$prepay_id"; $data["signType"] = "MD5"; $data["paySign"] = $this->sign($data); return $data; } /** * 获取发送到通知地址的数据(在通知地址内使用) * @return 结果数组，如果不是微信服务器发送的数据返回null * appid * bank_type * cash_fee * fee_type * is_subscribe * mch_id * nonce_str * openid * out_trade_no 商户订单号 * result_code * return_code * sign * time_end * total_fee 总金额 * trade_type * transaction_id 微信支付订单号 */ public function get_back_data() { $xml = file_get_contents("php://input"); $data = $this->xml2array($xml); if ($this->validate($data)) { return $data; } else { return null; } } /** * 验证数据签名 * @param $data 数据数组 * @return 数据校验结果 */ public function validate($data) { if (!isset($data["sign"])) { return false; } $sign = $data["sign"]; unset($data["sign"]); return $this->sign($data) == $sign; } /** * 响应微信支付后台通知 * @param $return_code 返回状态码 SUCCESS/FAIL * @param $return_msg 返回信息 */ public function response_back($return_code = "SUCCESS", $return_msg = null) { $data = array(); $data["return_code"] = $return_code; if ($return_msg) { $data["return_msg"] = $return_msg; } $xml = $this->array2xml($data); print $xml; } }
先调用getPrepayId方法，后再调用get_package方法，返回的参数传给前台。
三、前台js代码
function onBridgeReady(){ WeixinJSBridge.invoke( 'getBrandWCPayRequest', { "appId":"wx2421b1c4370ec43b", //公众号名称，由商户传入 "timeStamp":"1395712654", //时间戳，自1970年以来的秒数 "nonceStr":"e61463f8efa94090b1f366cccfbbb444", //随机串 "package":"prepay_id=u802345jgfjsdfgsdg888", "signType":"MD5", //微信签名方式： "paySign":"70EA570631E4BB79628FBCA90534C63FF7FADD89" //微信签名 }, function(res){ if(res.err_msg == "get_brand_wcpay_request:ok" ){ // 使用以上方式判断前端返回,微信团队郑重提示： //res.err_msg将在用户支付成功后返回ok，但并不保证它绝对可靠。 } }); } if (typeof WeixinJSBridge == "undefined"){ if( document.addEventListener ){ document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false); }else if (document.attachEvent){ document.attachEvent('WeixinJSBridgeReady', onBridgeReady); document.attachEvent('onWeixinJSBridgeReady', onBridgeReady); } }else{ onBridgeReady(); }
