PHP实现微信支付(jsapi支付)和退款(无需集成支付SDK)流程教程详解

/** 
 * 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; 
} 

?php 
require_once "wxpay.class.php"; 
$config = array( 
 'wxappid' => 'wx123456789876', 
 'mch_id' => '123456789', 
 'pay_apikey' => '123456789876123456789876123456789876' 
); 
$wxpay = new WxPay($config); 
$result = $wxpay->paytest(); 
?> 
html> 
head> 
 meta http-equiv="content-type" content="text/html;charset=utf-8"/> 
 meta name="viewport" content="width=device-width, initial-scale=1"/> 
 title>江南极客支付/title> 
 script type="text/javascript"> 
 //调用微信JS api 支付 
 function jsApiCall() 
 { 
 WeixinJSBridge.invoke( 
 'getBrandWCPayRequest',?php echo $result; ?>, 
 function(res){ 
 WeixinJSBridge.log(res.err_msg); 
 //alert(res); 
 if(res.err_msg == "get_brand_wcpay_request:ok"){ 
  alert("支付成功!"); 
 }else if(res.err_msg == "get_brand_wcpay_request:cancel"){ 
  alert("用户取消支付!"); 
 }else{ 
  alert("支付失败!"); 
 } 
 } 
 ); 
 } 
 function callpay() 
 { 
 if (typeof WeixinJSBridge == "undefined"){ 
 if( document.addEventListener ){ 
 document.addEventListener('WeixinJSBridgeReady', jsApiCall, false); 
 }else if (document.attachEvent){ 
 document.attachEvent('WeixinJSBridgeReady', jsApiCall); 
 document.attachEvent('onWeixinJSBridgeReady', jsApiCall); 
 } 
 }else{ 
 jsApiCall(); 
 } 
 } 
 /script> 
/head> 
body> 
 br/> 
 font color="#9ACD32">b>该笔订单支付金额为span style="color:#f00;font-size:50px">1分/span>钱/b>/font>br/>br/> 
 font color="#9ACD32">b>span style="color:#f00;font-size:50px;margin-left:40%;">1分/span>钱也是爱/b>/font>br/>br/> 
 div align="center"> 
 button style="width:210px; height:50px; border-radius: 15px;background-color:#FE6714; border:0px #FE6714 solid; cursor: pointer; color:white; font-size:16px;" type="button" onclick="callpay()" >果断买买买^_^/button> 
 /div> 
/body> 
/html>