小程序与php 实现微信支付
小程序访问地址：
paytest.php:
$appid=''; //小程序appid
$openid= 'oluqV5PKJzE8KVC5ky_iylTOnAY4'; //用户的微信openid
$mch_id=''; //微信商户号
$key=''; //微信支付API密钥
$out_trade_no = $mch_id. time(); //订单号
$total_fee = 0.01;
if(empty($total_fee)) //押金
{
$body = "充值押金";
$total_fee = floatval(99*100);
}
else {
$body = "充值余额";
$total_fee = floatval($total_fee*100);
}
$weixinpay = new WeixinPay($appid,$openid,$mch_id,$key,$out_trade_no,$body,$total_fee);
$return=$weixinpay->pay();
echo json_encode($return);
?>
/*
* 小程序微信支付
*/
class WeixinPay {
protected $appid;
protected $mch_id;
protected $key;
protected $openid;
protected $out_trade_no;
protected $body;
protected $total_fee;
protected $nonce_str;
function __construct($appid, $openid, $mch_id, $key,$out_trade_no,$body,$total_fee) {
$this->appid = $appid;
$this->openid = $openid;
$this->mch_id = $mch_id;
$this->key = $key;
$this->out_trade_no = $out_trade_no;
$this->body = $body;
$this->total_fee = $total_fee;
$this->nonce_str = $this->createNoncestr();
}
public function pay() {
//统一下单接口
$return = $this->weixinapp();
return $return;
}
//统一下单接口
private function unifiedorder() {
$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';
$parameters = array(
'appid' => $this->appid, //小程序ID
'mch_id' => $this->mch_id, //商户号
'nonce_str' => $this->nonce_str, //随机字符串
// 'body' => 'test', //商品描述
'body' => $this->body,
// 'out_trade_no' => '2015450806125348', //商户订单号
'out_trade_no'=> $this->out_trade_no,
// 'total_fee' => floatval(0.01 * 100), //总金额 单位 分
'total_fee' => $this->total_fee,
// 'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //终端IP
'spbill_create_ip' => '127.0.0.1', //终端IP
'notify_url' => 'http://你的域名/notify.php', //异步通知地址 确保外网能正常访问
'openid' => $this->openid, //用户id
'trade_type' => 'JSAPI'//交易类型
);
//统一下单签名
$parameters['sign'] = $this->getSign($parameters);
$xmlData = $this->arrayToXml($parameters);
$return = $this->xmlToArray($this->postXmlCurl($xmlData, $url, 60));
return $return;
}
private static function postXmlCurl($xml, $url, $second = 30)
{
$ch = curl_init();
//设置超时
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //严格校验
//设置header
curl_setopt($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, $xml);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt($ch, CURLOPT_TIMEOUT, 40);
set_time_limit(0);
//运行curl
$data = curl_exec($ch);
//返回结果
if ($data) {
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
throw new WxPayException("curl出错，错误码:$error");
}
}
//数组转换成xml
private function arrayToXml($arr) {
$xml = "
foreach ($arr as $key => $val) {
if (is_array($val)) {
$xml .= "<" . $key . ">" . arrayToXml($val) . "";
} else {
$xml .= "<" . $key . ">" . $val . "";
}
}
$xml .= "
return $xml;
}
//xml转换成数组
private function xmlToArray($xml) {
//禁止引用外部xml实体
libxml_disable_entity_loader(true);
$xmlstring = simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA);
$val = json_decode(json_encode($xmlstring), true);
return $val;
}
//微信小程序接口
private function weixinapp() {
//统一下单接口
$unifiedorder = $this->unifiedorder();
// print_r($unifiedorder);
$parameters = array(
'appId' => $this->appid, //小程序ID
'timeStamp' => '' . time() . '', //时间戳
'nonceStr' => $this->nonce_str, //随机串
'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //数据包
'signType' => 'MD5'//签名方式
);
//签名
$parameters['paySign'] = $this->getSign($parameters);
return $parameters;
}
//作用：产生随机字符串，不长于32位
private function createNoncestr($length = 32) {
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
//作用：生成签名
private function getSign($Obj) {
foreach ($Obj as $k => $v) {
$Parameters[$k] = $v;
}
//签名步骤一：按字典序排序参数
ksort($Parameters);
$String = $this->formatBizQueryParaMap($Parameters, false);
//签名步骤二：在string后加入KEY
$String = $String . "&key=" . $this->key;
//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 $result_;
}
///作用：格式化参数，签名过程需要使用
private function formatBizQueryParaMap($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 $reqPar;
}
}
notify.php：
include_once("./log_.php");
date_default_timezone_set('prc');
//微信支付回调验证
//$xml = $GLOBALS['HTTP_RAW_POST_DATA']; //PHP7以下版本使用这个获取（如果不能获取，使用下面这行）
$xml = file_get_contents("php://input"); //使用的是php7，原因是php7已移除这个全局变量
//以log文件形式记录回调信息
$log_ = new Log_();
$log_name="./notify_url.log";//log文件路径
$log_->log_result($log_name,"test Acepe\n".$xml."\n");
//将服务器返回的XML数据转化为数组
$data = self::xml2array($xml);
// 保存微信服务器返回的签名sign
$data_sign = $data['sign'];
// sign不参与签名算法
unset($data['sign']);
$sign = self::makeSign($data);
// 判断签名是否正确 判断支付状态
if ( ($sign===$data_sign) && ($data['return_code']=='SUCCESS') && ($data['result_code']=='SUCCESS') ) {
$result = $data;
//获取服务器返回的数据
$order_sn = $data['out_trade_no']; //订单单号
$openid = $data['openid']; //付款人openID
$total_fee = $data['total_fee']; //付款金额
$transaction_id = $data['transaction_id']; //微信支付流水号
//更新数据库
$this->updateDB($order_sn,$openid,$total_fee,$transaction_id);
}else{
$result = false;
}
// 返回状态给微信服务器
if ($result) {
$str='
}else{
$str='
}
echo $str;
return $result;
?>
log_.php：
class Log_
{
// 打印log
function log_result($file,$word)
{
$fp = fopen($file,"a");
flock($fp, LOCK_EX) ;
fwrite($fp,"执行日期：".date("Y-m-d H:i:s",time())."\n".$word."\n\n");
flock($fp, LOCK_UN);
fclose($fp);
}
}
?>