微信小程序与php 实现微信支付的简单实例

微信小程序与php 实现微信支付的简单实例

微信小程序与php 实现微信支付的简单实例

小程序访问地址：

payfee.PHP:

include 'WeixinPay.php';

$appid='';

$openid= $_GET['id'];

$mch_id='';

$key='';

$out_trade_no = $mch_id. time();

$total_fee = $_GET['fee'];

if(empty($total_fee)) //押金

{

$body = "充值押金";

$total_fee = floatval(Tpacl9Tpacl9*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);

WeixinPay.php:

/*

* 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;

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;

}

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->createNoncestr(), //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' => '192.168.0.161', //终端IP

'notify_url' => 'http://weixin.qq.com/wxpay/pay.php', //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) . "" . $key . ">";

} else {

$xml .= "<" . $key . ">" . $val . "" . $key . ">";

}

}

$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->createNoncestr(), //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++) {

$str .= substr($chhttp://ars, 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;

}

}

小程序页面处理：

wx.request({

url:'https://yourhost.com/weixin/WeiActivity/payfee.php',//改成你自己的链接

header:{

'Content-Type':'application/x-www-form-urlencoded'

},

method:'POST',

success:function(res){

console.log(res.data);

console.log('调起支付');

wx.requestPayment({

'timeStamp': res.data.timeStamp,

'nonceStr': res.data.nonceStr,

'package': res.data.package,

'signType':'MD5',

'paySign': res.data.paySign,

'success':function(res){

console.log('success');

wx.showToast({

title:'支付成功',

icon:'success',

duration:3000

});

},

'fail':function(res){

console.log('fail');

},

'complete':function(res){

console.log('complete');

}

});

},

fail:function(res){

console.log(res.data)

}

});

回调url:notify.php

$postXml = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信参数

if (empty($postXml)) {

return false;

}

//将xml格式转换成数组

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;

}

$attr = xmlToArray($postXml);

$total_fee = $attr[total_fee];

$open_id = $attr[openid];

$out_trade_no = $attr[out_trade_no];

$time = $attr[time_end];

以上几步你就可以完成小程序的微信支付与php完美的结合起来

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