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微信小程序與php 實現微信支付的簡單實例
小程序訪問地址：
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(99*100);
}
else {
$body = "充值余額";
$total_fee = floatval($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:
<?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() {
//統一下單接口
$return = $this->weixinapp();
return $return;
}
//統一下單接口
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, //商戶號
'nonce_str' => $this->createNoncestr(), //隨機字符串
// 'body' => 'test', //商品描述
'body' => $this->body,
// 'out_trade_no' => '2015450806125348', //商戶訂單號
'out_trade_no'=> $this->out_trade_no,
// 'total_fee' => floatval(0.01 * 100), //總金額 單位 分
'total_fee' => $this->total_fee,
// 'spbill_create_ip' => $_SERVER['REMOTE_ADDR'], //終端IP
'spbill_create_ip' => '192.168.0.161', //終端IP
'notify_url' => 'http://www.weixin.qq.com/wxpay/pay.php', //通知地址 確保外網能正常訪問
'openid' => $this->openid, //用戶id
'trade_type' => 'JSAPI'//交易類型
);
//統一下單簽名
$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)
{
$ch = curl_init();
//設置超時
curl_setopt($ch, CURLOPT_TIMEOUT, $second);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //嚴格校驗
//設置header
curl_setopt($ch, CURLOPT_HEADER, FALSE);
//要求結果為字符串且輸出到屏幕上
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);
//運行curl
$data = curl_exec($ch);
//返回結果
if ($data) {
curl_close($ch);
return $data;
} else {
$error = curl_errno($ch);
curl_close($ch);
throw new WxPayException("curl出錯，錯誤碼:$error");
}
}
//數組轉換成xml
private function arrayToXml($arr) {
$xml = "<root>";
foreach ($arr as $key => $val) {
if (is_array($val)) {
$xml .= "<" . $key . ">" . arrayToXml($val) . "</" . $key . ">";
} else {
$xml .= "<" . $key . ">" . $val . "</" . $key . ">";
}
}
$xml .= "</root>";
return $xml;
}
//xml轉換成數組
private function xmlToArray($xml) {
//禁止引用外部xml實體
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() {
//統一下單接口
$unifiedorder = $this->unifiedorder();
// print_r($unifiedorder);
$parameters = array(
'appId' => $this->appid, //小程序ID
'timeStamp' => '' . time() . '', //時間戳
'nonceStr' => $this->createNoncestr(), //隨機串
'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //數據包
'signType' => 'MD5'//簽名方式
);
//簽名
$parameters['paySign'] = $this->getSign($parameters);
return $parameters;
}
//作用：產生隨機字符串，不長于32位
private function createNoncestr($length = 32) {
$chars = "abcdefghijklmnopqrstuvwxyz0123456789";
$str = "";
for ($i = 0; $i < $length; $i++) {
$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
}
return $str;
}
//作用：生成簽名
private function getSign($Obj) {
foreach ($Obj as $k => $v) {
$Parameters[$k] = $v;
}
//簽名步驟一：按字典序排序參數
ksort($Parameters);
$String = $this->formatBizQueryParaMap($Parameters, false);
//簽名步驟二：在string后加入KEY
$String = $String . "&key=" . $this->key;
//簽名步驟三：MD5加密
$String = md5($String);
//簽名步驟四：所有字符轉為大寫
$result_ = strtoupper($String);
return $result_;
}
///作用：格式化參數，簽名過程需要使用
private function formatBizQueryParaMap($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;
}
}
小程序頁面處理：
wx.request({
url:'https://www.yourhost.com/weixin/WeiActivity/payfee.php',//改成你自己的鏈接
header:{
'Content-Type':'application/x-www-form-urlencoded'
},
method:'POST',
success:function(res){
console.log(res.data);
console.log('調起支付');
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)
}
});
回調url:notify.php
$postXml = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信參數
if (empty($postXml)) {
return false;
}
//將xml格式轉換成數組
function xmlToArray($xml) {
//禁止引用外部xml實體
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];
以上幾步你就可以完成小程序的微信支付與php完美的結合起來
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