PHP实现微信小程序支付
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本文仅记录了微信小程序支付开发的基本流程和代码,具体业务需自行修改。tp5框架下演示:
参考:
微信小程序支付:业务流程
SDK与DEMO: 下载页
小程序端:
goPay(e)
var that = this;
//发起预支付,获取所需参数 wx.request( url: app.globalData.host + ‘/api/wx_pay/createOrder‘, //请求地址 data: openid: wx.getStorageSync(‘openid‘), total_fee: that.data.totalPrice, goods: JSON.stringify(that.data.goods) , method: ‘POST‘, success(res)
console.log(res)
if(res.data.code == 1) //发起微信支付 wx.requestPayment( timeStamp: res.data.data.timeStamp, nonceStr: res.data.data.nonceStr, package: res.data.data.package, signType: res.data.data.signType, paySign: res.data.data.paySign, success(r)
console.log(r) //do something //比如回调,修改状态等操作 , fail() wx.showToast( title: ‘支付失败‘, icon: ‘none‘ ) ) else wx.showToast( title: res.data.data, icon: ‘none‘ ) ) ,
PHP端:
WxPay.php
<?php namespace app\api\controller; use app\api\controller\Common; use think\Db; /** * 微信支付 */ class WxPay extends Common //生成订单 public function createOrder() if (request()->isPost())
$openid = input(‘openid‘); $total_fee = input(‘total_fee‘);$orderid = get_order_sn(); //生成订单号 if (!$openid) return json(array(‘code‘=>3, ‘data‘=>‘no openid‘)); $goods = json_decode(input(‘goods‘), TRUE); // 添加订单,自行添加 $insert_order_id = Db::name(‘order‘) ->insertGetId(array( ‘pay_price‘ => $total_fee, ‘orderid‘ => $orderid )); if($insert_order_id)
/* 调用微信【统一下单】 */
$res = $this->pay($total_fee, $openid, $orderid);
return json(array(‘code‘=>1, ‘data‘=>$res, ‘oid‘=>$insert_order_id));
/* 首先在服务器端调用微信【统一下单】接口,返回prepay_id和sign签名等信息给前端,前端调用微信支付接口 */
private function Pay($total_fee, $openid, $order_id, $body=‘‘)
$appid = config(‘myapp.appid‘);//小程序的appid
$body = config(‘site.title‘).‘-‘.$body;
$mch_id = config(‘myapp.pay_mchid‘);
$KEY = config(‘myapp.pay_apikey‘);
$nonce_str = (string)mt_rand(10000, 99999).time();//随机字符串
$notify_url = request()->domain().‘api/wx_pay/notify‘; //支付完成回调地址url,不能带参数
$out_trade_no = $order_id; //商户订单号
$spbill_create_ip = $_SERVER[‘SERVER_ADDR‘];
$trade_type = ‘JSAPI‘;//交易类型 默认JSAPI
//这里是按照顺序的 因为下面的签名是按照(字典序)顺序 排序错误 肯定出错
$post[‘appid‘] = $appid;
$post[‘body‘] = $body;
$post[‘mch_id‘] = $mch_id;
$post[‘nonce_str‘] = $nonce_str;//随机字符串
$post[‘notify_url‘] = $notify_url;
$post[‘openid‘] = $openid;
$post[‘out_trade_no‘] = $out_trade_no;
$post[‘spbill_create_ip‘] = $spbill_create_ip;//服务器终端的ip
$post[‘total_fee‘] = intval($total_fee); //总金额 最低为一分钱 必须是整数
$post[‘trade_type‘] = $trade_type;
$sign = $this->MakeSign($post, $KEY); //签名
$post_xml = ‘<xml> <appid>‘.$appid.‘</appid>
<body>‘.$body.‘</body>
<mch_id>‘.$mch_id.‘</mch_id>
<nonce_str>‘.$nonce_str.‘</nonce_str>
<notify_url>‘.$notify_url.‘</notify_url>
<openid>‘.$openid.‘</openid>
<out_trade_no>‘.$out_trade_no.‘</out_trade_no>
<spbill_create_ip>‘.$spbill_create_ip.‘</spbill_create_ip>
<total_fee>‘.$total_fee.‘</total_fee>
<trade_type>‘.$trade_type.‘</trade_type>
<sign>‘.$sign.‘</sign></xml> ‘;
//统一下单接口prepay_id
$url = ‘https://api.mch.weixin.qq.com/pay/unifiedorder‘;
$xml = $this->http_request($url,$post_xml); //POST方式请求http
$array = $this->xml2array($xml); //将【统一下单】api返回xml数据转换成数组,全要大写
if($array[‘RETURN_CODE‘] == ‘SUCCESS‘ && $array[‘RESULT_CODE‘] == ‘SUCCESS‘)
$time = time();
$tmp=‘‘; //临时数组用于签名
$tmp[‘appId‘] = $appid;
$tmp[‘nonceStr‘] = $nonce_str;
$tmp[‘package‘] = ‘prepay_id=‘.$array[‘PREPAY_ID‘];
$tmp[‘signType‘] = ‘MD5‘;
$tmp[‘timeStamp‘] = "$time";
$data[‘code‘] = 1;
$data[‘timeStamp‘] = "$time"; //时间戳
$data[‘nonceStr‘] = $nonce_str; //随机字符串
$data[‘signType‘] = ‘MD5‘; //签名算法,暂支持 MD5
$data[‘package‘] = ‘prepay_id=‘.$array[‘PREPAY_ID‘]; //统一下单接口返回的 prepay_id 参数值,提交格式如:prepay_id=*
$data[‘paySign‘] = $this->MakeSign($tmp,$KEY); //签名,具体签名方案参见微信公众号支付帮助文档;
$data[‘out_trade_no‘] = $out_trade_no;
else
$data[‘code‘] = 0;
$data[‘msg‘] = "错误";
$data[‘RETURN_CODE‘] = $array[‘RETURN_CODE‘];
$data[‘RETURN_MSG‘] = $array[‘RETURN_MSG‘];
$data[‘ERR_CODE_DES‘] = $array[‘ERR_CODE_DES‘];
return $data;
/** * 生成签名, $KEY就是支付key * @return 签名 */
public function MakeSign($params,$KEY)
//签名步骤一:按字典序排序数组参数
ksort($params);
$string = $this->ToUrlParams($params); //参数进行拼接key=value&k=v
//签名步骤二:在string后加入KEY
$string = $string . "&key=".$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;
/** * 将参数拼接为url: key=value&key=value * @param $params * @return string */
public function ToUrlParams( $params )
$string = ‘‘;
if( !empty($params) )
$array = array();
foreach( $params as $key => $value )
$array[] = $key.‘=‘.$value;
$string = implode("&",$array);
return $string;
/** * 调用接口, $data是数组参数 * @return 签名 */
public function http_request($url, $data = null, $headers=array())
$curl = curl_init();
if( count($headers) >= 1 )
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
if (!empty($data))
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($curl);
curl_close($curl);
return $output;
//获取xml里面数据,转换成array
private function xml2array($xml)
$p = xml_parser_create();
xml_parse_into_struct($p, $xml, $vals, $index);
xml_parser_free($p);
$data = "";
foreach ($index as $key=>$value)
if($key == ‘xml‘ || $key == ‘XML‘)
continue;
$tag = $vals[$value[0]][‘tag‘];
$value = $vals[$value[0]][‘value‘];
$data[$tag] = $value;
return $data;
//支付完后的回调
public function notify()
//do something
//更新支付状态
//更新购物商品状态
return json(array(‘code‘=> 1, ‘data‘=>‘支付成功‘));
没整理好,以后有时间再说吧,,,
以上所有方法都可从SDK及DEMO中寻得,官方参考。
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