<?php
class WxPay{
/**
* 默认支付参数配置,可以在这里配置,也可以在初始化的时候,统一传入参数
* @var array
*/
private $config = array(
'appid' => 'xxxxxxxxxxxxxx',
'mch_id' => 'xxxxxxxx',
'pay_apikey' => 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
'api_cert' => './apiclient_cert.pem',
'api_key' => './apiclient_key.pem'
);
public function __construct($config = array()){
$this->config = array_merge($this->config,$config);
}
/**
* 使用 $this->name=$value 配置参数
* @param string $name 配置名称
* @param string $value 配置值
*/
public function __set($name,$value){
if(isset($this->config[$name])) {
$this->config[$name] = $value;
}
}
/**
* 使用 $this->name 获取配置
* @param string $name 配置名称
* @return multitype 配置值
*/
public function __get($name) {
return $this->config[$name];
}
public function __isset($name){
return isset($this->config[$name]);
}
//----------------------------------------------------------重点看这里---------------------------------------------------------
/**
* 微信支付请求接口(POST)
* @param string $openid openid
* @param string $body 商品简单描述
* @param string $order_sn 订单编号
* @param string $total_fee 金额
* @return json的数据
*/
public function wxpay($openid,$total_fee,$body,$order_sn){
$config = $this->config;
//统一下单参数构造
$unifiedorder = array(
'appid' => $config['appid'],
'mch_id' => $config['mch_id'],
'nonce_str' => self::getNonceStr(),
'body' => $body,
'out_trade_no' => $order_sn,
'total_fee' => $total_fee * 100,
'spbill_create_ip' => self::getip(),
'notify_url' => 'http://'.$_SERVER['HTTP_HOST'].'/notify.php',
'trade_type' => 'JSAPI',
'openid' => $openid
);
$unifiedorder['sign'] = self::makeSign($unifiedorder);
//return $unifiedorder;
//请求数据,统一下单
$xmldata = self::array2xml($unifiedorder);
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$res = self::curl_post_ssl($url, $xmldata);
if(!$res){
return array('status'=>0, 'msg'=>"Can't connect the server" );
}
// 这句file_put_contents是用来查看服务器返回的结果 测试完可以删除了
//file_put_contents('./log.txt',$res,FILE_APPEND);
$content = self::xml2array($res);
if(strval($content['result_code']) == 'FAIL'){
return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des']));
}
if(strval($content['return_code']) == 'FAIL'){
return array('status'=>0, 'msg'=>strval($content['return_msg']));
}
$time = time();
settype($time, "string"); //jsapi支付界面,时间戳必须为字符串格式
$resdata = array(
'appId' => strval($content['appid']),
'nonceStr' => strval($content['nonce_str']),
'package' => 'prepay_id='.strval($content['prepay_id']),
'signType' => 'MD5',
'timeStamp' => $time
);
$resdata['paySign'] = self::makeSign($resdata);
return json_encode($resdata);
}
/**
* 微信退款(POST)
* @param string(28) $transaction_id 在微信支付的时候,微信服务器生成的订单流水号,在支付通知中有返回
* @param string $out_refund_no 商品简单描述
* @param string $total_fee 微信支付的时候支付的总金额(单位:分)
* @param string $refund_fee 此次要退款金额(单位:分)
* @return string xml格式的数据
*/
public function refund($transaction_id,$out_refund_no,$total_fee,$refund_fee){
$config = $this->config;
//退款参数
$refundorder = array(
'appid' => $config['appid'],
'mch_id' => $config['mch_id'],
'nonce_str' => self::getNonceStr(),
'transaction_id'=> $transaction_id,
'out_refund_no' => $out_refund_no,
'total_fee' => $total_fee * 100,
'refund_fee' => $refund_fee * 100
);
$refundorder['sign'] = self::makeSign($refundorder);
//请求数据,进行退款
$xmldata = self::array2xml($refundorder);
$url = 'https://api.mch.weixin.qq.com/secapi/pay/refund';
$res = self::curl_post_ssl($url, $xmldata);
if(!$res){
return array('status'=>0, 'msg'=>"Can't connect the server" );
}
// 这句file_put_contents是用来查看服务器返回的结果 测试完可以删除了
//file_put_contents('./log3.txt',$res,FILE_APPEND);
$content = self::xml2array($res);
if(strval($content['result_code']) == 'FAIL'){
return array('status'=>0, 'msg'=>strval($content['err_code']).':'.strval($content['err_code_des']));
}
if(strval($content['return_code']) == 'FAIL'){
return array('status'=>0, 'msg'=>strval($content['return_msg']));
}
return $content;
}
//-------------------------------------------------------------------------------------------------------------------------------
//---------------------------------------------------------------用到的函数------------------------------------------------------
/**
* 将一个数组转换为 XML 结构的字符串
* @param array $arr 要转换的数组
* @param int $level 节点层级, 1 为 Root.
* @return string XML 结构的字符串
*/
protected function array2xml($arr, $level = 1) {
$s = $level == 1 ? "<xml>" : '';
foreach($arr as $tagname => $value) {
if (is_numeric($tagname)) {
$tagname = $value['TagName'];
unset($value['TagName']);
}
if(!is_array($value)) {
$s .= "<{$tagname}>".(!is_numeric($value) ? '<![CDATA[' : '').$value.(!is_numeric($value) ? ']]>' : '')."</{$tagname}>";
} else {
$s .= "<{$tagname}>" . $this->array2xml($value, $level + 1)."</{$tagname}>";
}
}
$s = preg_replace("/([\x01-\x08\x0b-\x0c\x0e-\x1f])+/", ' ', $s);
return $level == 1 ? $s."</xml>" : $s;
}
/**
* 将xml转为array
* @param string $xml xml字符串
* @return array 转换得到的数组
*/
protected function xml2array($xml){
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$result= json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
return $result;
}
/**
*
* 产生随机字符串，不长于32位
* @param int $length
* @return 产生的随机字符串
*/
protected function getNonceStr($length = 32) {
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str ="";
for ( $i = 0; $i < $length; $i++ ) {
$str .= substr($chars, mt_rand(0, strlen($chars)-1), 1);
}
return $str;
}
/**
* 生成签名
* @return 签名
*/
protected function makeSign($data){
//获取微信支付秘钥
$key = $this->config['pay_apikey'];
// 去空
$data=array_filter($data);
//签名步骤一：按字典序排序参数
ksort($data);
$string_a=http_build_query($data);
$string_a=urldecode($string_a);
//签名步骤二：在string后加入KEY
$string_sign_temp=$string_a."&key=".$key;
//签名步骤三：MD5加密
$sign = md5($string_sign_temp);
// 签名步骤四：所有字符转为大写
$result=strtoupper($sign);
return $result;
}
/**
* 获取IP地址
* @return [String] [ip地址]
*/
protected function getip() {
static $ip = '';
$ip = $_SERVER['REMOTE_ADDR'];
if(isset($_SERVER['HTTP_CDN_SRC_IP'])) {
$ip = $_SERVER['HTTP_CDN_SRC_IP'];
} elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_
