支付2.开始js代码pay:function(){//下订单并唤起微信支付varprice='0.01';//支付金额varopenid='';//这里传用户openid,怎么获取用户的ope..._php 微信小程序支付。钱0.01分怎么传">
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实际应用项目:http://github.crmeb.net/u/long
1.先写一个可以点击支付的按钮
<view class="chongzhi_button" bindtap="pay">支付</view>
2.开始js代码
- pay: function(){
- //下订单并唤起微信支付
- var price = '0.01'; //支付金额
- var openid = ''; //这里传用户openid,怎么获取用户的openid这里就不详细的说了
- var that = this;
- wx.request({
- url: '这里写后端接口地址',
- data: {
- price: price,
- openid: openid
- },
- method: "POST",
- headers: {
- 'Content-Type': 'application/json'
- },
- success: function (res) {
- //客户单发起微信请求
- wx.requestPayment({
- 'appId': '这里写小程序的appId',
- 'timeStamp': res.data.timeStamp,
- 'nonceStr': res.data.nonceStr,
- 'package': res.data.package,
- 'signType': 'MD5',
- 'paySign': res.data.paySign,
- 'success': function (res) {
- wx.showToast({
- title: '支付成功',
- duration: 1200
- })
- console.log('支付成功');
- setTimeout(function () {
- wx.redirectTo({
- url: '../pay/payok?paymoney=' + that.data.paymoney + '&body=' + that.data.contents
- })
- }, 1000);
- //这里完成跳转
- },
- 'fail': function (res) {
- if (res.errMsg == "requestPayment:fail cancel") {
- wx.showToast({
- title: '支付取消',
- duration: 1200
- })
- } else {
- wx.showToast({
- title: '支付失败',
- image: '../../images/error.png',
- duration: 1200
- })
- }
- //支付失败
- console.log(res);
- },
- 'complete': function (res) { }
- })
- }
- })

代码开始
- /**
- * 小程序支付
- */
- public function Pay(){
- $fee = 0.01;//举例充值0.01
- $openid = '填写openid';
- $appid = '小程序AddId';//这里写小程序AddId
- $body = '标题'; //这个自己写,微信订单里面显示的是商品名称
- $mch_id = '你的商户号';
- $nonce_str = $this->nonce_str();//随机字符串
- $notify_url = '填写你的回调地址';
- $out_trade_no = $this->order_number($openid);//商户订单号
- $spbill_create_ip = '服务器Ip地址';
- $total_fee = $fee*100;//因为充值金额最小是1 而且单位为分 如果是充值1元所以这里需要*100
- $trade_type = 'JSAPI';//交易类型 默认
- //这里是按照顺序的 因为下面的签名是按照顺序 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; //终端的ip
- $post['total_fee'] = $total_fee; //总金额 最低为一块钱 必须是整数
- $post['trade_type'] = $trade_type;
- $sign = $this->sign($post); //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> ';
- //统一接口prepay_id
- $url = 'https://api.mch.weixin.qq***/pay/unifiedorder';
- $xml = $this->http_request($url,$post_xml);
- $array = $this->xml($xml);//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['state'] = 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'];//统一接口返回的 prepay_id 参数值,提交格式如:prepay_id=*
- $data['paySign'] = $this->sign($tmp);//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['state'] = 0;
- $data['text'] = "错误";
- $data['RETURN_CODE'] = $array['RETURN_CODE'];
- $data['RETURN_MSG'] = $array['RETURN_MSG'];
- }
- echo json_encode($data);
- }
-
- //随机32位字符串
- private function nonce_str(){
- $result = '';
- $str = 'QWERTYUIOPASDFGHJKLZXVBNMqwertyuioplkjhgfdsamnbvcxz';
- for ($i=0;$i<32;$i++){
- $result .= $str[rand(0,48)];
- }
- return $result;
- }
-
- //生成订单号
- private function order_number($openid){
- //date('Ymd',time()).time().rand(10,99);//18位
- return md5($openid.time().rand(10,99));//32位
- }
-
- //签名 $data要先排好顺序
- private function sign($data){
- $stringA = '';
- foreach ($data as $key=>$value){
- if(!$value) continue;
- if($stringA) $stringA .= '&'.$key."=".$value;
- else $stringA = $key."=".$value;
- }
- $wx_key = '支付秘钥';
- $stringSignTemp = $stringA.'&key='.$wx_key;//申请支付后有给予一个商户账号和密码,登陆后自己设置key
- return strtoupper(md5($stringSignTemp));
- }
-
- //curl请求啊
- function http_request($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 $output;
- }
-
- //获取xml
- private function xml($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;
- }

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