小程式與php 實現微信支付
阿新 • • 發佈：2019-01-23
小程式訪問地址：
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 = "充值餘額"; $total_fee = floatval($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 /* * 小程式微信支付 */ 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() { //統一下單介面 $return = $this->weixinapp(); return $return; } //統一下單介面 private function unifiedorder() { $url = 'https://api.mch.weixin.qq.com/pay/unifiedorder'; $parameters = array( 'appid' => $this->appid, //小程式ID 'mch_id' => $this->mch_id, //商戶號 'nonce_str' => $this->createNoncestr(), //隨機字串 // '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, //使用者id 'trade_type' => 'JSAPI'//交易型別 ); //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) { $ch = curl_init(); //設定超時 curl_setopt($ch, CURLOPT_TIMEOUT, $second); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE); //嚴格校驗 //設定header curl_setopt($ch, CURLOPT_HEADER, FALSE); //要求結果為字串且輸出到螢幕上 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); //執行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"); } } //陣列轉換成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 $xml; } //xml轉換成陣列 private function xmlToArray($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; } //微信小程式介面 private function weixinapp() { //統一下單介面 $unifiedorder = $this->unifiedorder(); // print_r($unifiedorder); $parameters = array( 'appId' => $this->appid, //小程式ID 'timeStamp' => '' . time() . '', //時間戳 'nonceStr' => $this->createNoncestr(), //隨機串 'package' => 'prepay_id=' . $unifiedorder['prepay_id'], //資料包 'signType' => 'MD5'//簽名方式 ); //簽名 $parameters['paySign'] = $this->getSign($parameters); return $parameters; } //作用：產生隨機字串，不長於32位 private function createNoncestr($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] = $v; } //簽名步驟一：按字典序排序引數 ksort($Parameters); $String = $this->formatBizQueryParaMap($Parameters, false); //簽名步驟二：在string後加入KEY $String = $String . "&key=" . $this->key; //簽名步驟三：MD5加密 $String = md5($String); //簽名步驟四：所有字元轉為大寫 $result_ = strtoupper($String); return $result_; } ///作用：格式化引數，簽名過程需要使用 private function formatBizQueryParaMap($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; } }
小程式頁面處理：
wx.request({ url:'https://www.yourhost.com/weixin/WeiActivity/payfee.php',//改成你自己的連結 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) } });
回撥url:notify.php
$postXml = $GLOBALS["HTTP_RAW_POST_DATA"]; //接收微信引數
if (empty($postXml)) {
return false;
}
//將xml格式轉換成陣列
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式的微信支付與php完美的結合起來