微信App 支付 PHP后台接口代码

<?php namespace App\Http\Controllers\Api\V1; use Illuminate\Http\Request; use App\Http\Controllers\Controller; class WechatAppPay extends Controller { //接口API URL前缀 const API_URL_PREFIX = 'https://api.mch.weixin.qq.com'; //下单地址URL const UNIFIEDORDER_URL = "/pay/unifiedorder"; //查询订单URL const ORDERQUERY_URL = "/pay/orderquery"; //关闭订单URL const CLOSEORDER_URL = "/pay/closeorder"; //公众账号ID private $appid; //商户号 private $mch_id; //随机字符串 private $nonce_str; //签名 private $sign; //商品描述 private $body; //商户订单号 private $out_trade_no; //支付总金额 private $total_fee; //终端IP private $spbill_create_ip; //支付结果回调通知地址 private $notify_url; //交易类型 private $trade_type; //支付密钥 private $key; //证书路径 private $SSLCERT_PATH; private $SSLKEY_PATH; //所有参数 private $params = array(); public function __construct($options) { $this->appid = isset($options['appid'])?$options['appid']:''; $this->mch_id = isset($options['mch_id'])?$options['mch_id']:''; $this->notify_url = isset($options['notify_url'])?$options['notify_url']:''; $this->key = isset($options['key'])?$options['key']:''; } /** * 下单方法 * @param $params 下单参数 */ public function unifiedOrder( $params ){ $this->body = $params['body']; $this->out_trade_no = $params['out_trade_no']; $this->total_fee = $params['total_fee']; $this->trade_type = $params['trade_type']; $this->nonce_str = $this->genRandomString(); $this->spbill_create_ip = $_SERVER['REMOTE_ADDR']; $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->nonce_str; $this->params['body'] = $this->body; $this->params['out_trade_no'] = $this->out_trade_no; $this->params['total_fee'] = $this->total_fee; $this->params['spbill_create_ip'] = $this->spbill_create_ip; $this->params['notify_url'] = $this->notify_url; $this->params['trade_type'] = $this->trade_type; //获取签名数据 $this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign; $xml = $this->data_to_xml($this->params); $response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::UNIFIEDORDER_URL); if( !$response ){ return false; } $result = $this->xml_to_data( $response ); if( !empty($result['result_code']) && !empty($result['err_code']) ){ $result['err_msg'] = $this->error_code( $result['err_code'] ); } return $result; } /** * 查询订单信息 * @param $out_trade_no 订单号 * @return array */ public function orderQuery( $out_trade_no ){ $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->genRandomString(); $this->params['out_trade_no'] = $out_trade_no; //获取签名数据 $this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign; $xml = $this->data_to_xml($this->params); $response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::ORDERQUERY_URL); if( !$response ){ return false; } $result = $this->xml_to_data( $response ); if( !empty($result['result_code']) && !empty($result['err_code']) ){ $result['err_msg'] = $this->error_code( $result['err_code'] ); } return $result; } /** * 关闭订单 * @param $out_trade_no 订单号 * @return array */ public function closeOrder( $out_trade_no ){ $this->params['appid'] = $this->appid; $this->params['mch_id'] = $this->mch_id; $this->params['nonce_str'] = $this->genRandomString(); $this->params['out_trade_no'] = $out_trade_no; //获取签名数据 $this->sign = $this->MakeSign( $this->params ); $this->params['sign'] = $this->sign; $xml = $this->data_to_xml($this->params); $response = $this->postXmlCurl($xml, self::API_URL_PREFIX.self::CLOSEORDER_URL); if( !$response ){ return false; } $result = $this->xml_to_data( $response ); return $result; } /** * * 获取支付结果通知数据 * return array */ public function getNotifyData(){ //获取通知的数据 $xml = $GLOBALS['HTTP_RAW_POST_DATA']; $data = array(); if( empty($xml) ){ return false; } $data = $this->xml_to_data( $xml ); if( !empty($data['return_code']) ){ if( $data['return_code'] == 'FAIL' ){ return false; } } return $data; } /** * 接收通知成功后应答输出XML数据 * @param string $xml */ public function replyNotify(){ $data['return_code'] = 'SUCCESS'; $data['return_msg'] = 'OK'; $xml = $this->data_to_xml( $data ); echo $xml; die(); } /** * 生成APP端支付参数 * @param $prepayid 预支付id */ public function getAppPayParams( $prepayid ){ $data['appid'] = $this->appid; $data['partnerid'] = $this->mch_id; $data['prepayid'] = $prepayid['prepay_id']; $data['package'] = 'Sign=WXPay'; $data['noncestr'] = $prepayid['nonce_str']; $data['timestamp'] = time(); $data['sign'] = $this->MakeSign( $data ); return $data; } /** * 生成签名 * @return 签名 */ public function MakeSign( $params ){ //签名步骤一：按字典序排序数组参数 ksort($params); $string = $this->ToUrlParams($params); //签名步骤二：在string后加入KEY $string = trim($string . "&key=".$this->key) ; //var_dump($string);die; //签名步骤三：MD5加密 $string = md5($string); //签名步骤四：所有字符转为大写 $result = strtoupper($string); return $result; } /** * 将参数拼接为url: key=value&key=value * @param $params * @return string */ public function ToUrlParams( $params ){ $string = ''; if( !empty($params) ){ $array = array(); foreach( $params as $key => $value ){ $array[] = $key.'='.$value; } $string = implode("&",$array); } return $string; } /** * 输出xml字符 * @param $params 参数名称 * return string 返回组装的xml **/ public function data_to_xml( $params ){ if(!is_array($params)|| count($params) <= 0) { return false; } $xml = "<xml>"; foreach ($params as $key=>$val) { if (is_numeric($val)){ $xml.="<".$key.">".$val."</".$key.">"; }else{ $xml.="<".$key."><![CDATA[".$val."]]></".$key.">"; } } $xml.="</xml>"; return $xml; } /** * 将xml转为array * @param string $xml * return array */ public function xml_to_data($xml){ if(!$xml){ return false; } //将XML转为array //禁止引用外部xml实体 libxml_disable_entity_loader(true); $data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); return $data; } /** * 获取毫秒级别的时间戳 */ private static function getMillisecond(){