这里我直接上代码，附有注释，直接把我的代码粘贴一下就可以用了，也是自己走了好多的弯路。。，写在博客里做个记录
直接把里面的参数替换成你的就可以了，前提是你要开通的有微信支付功能，需要商户号，appid，appsecret,openid，
openid的获取比较简单，我再写一篇博客做介绍，不懂得可以私聊我
//小程序端代码：
pay:
function
(){
var
that=
this
wx.getStorage({
key:
'openid'
,
success:
function
(res) {
wx.request({
//这里是后台的处理方法，url是自定义的，直接换成你自己的后台处理方法即可，Wx_Pay这个方法在下面写的有//后台用的php做处理，java的可以参考方法，道理都是一样的
url: url +
'Wx_Pay'
,
data: {
//用户的openid
openid:res.data,
//用户的openid
openid:res.data,
fee: that.data.totalPrice, //支付金额
details: that.data.goodsList[
0
].goods_name,//支付商品的名称
},
success:
function
(result){
if
(result.data){
//out_trade_no=res.data['out_trade_no'];
wx.requestPayment({
timeStamp: result.data[
'timeStamp'
],
nonceStr: result.data[
'nonceStr'
],
package
: result.data[
'package'
],
signType:
'MD5'
,
paySign: result.data[
'paySign'
],
'success'
:
function
(successret){
console.log(
'支付成功'
);
//获取支付用户的信息
//获取支付用户的信息
wx.getStorage({
key:
'userInfo'
,
success:
function
(getuser) {
//加入订单表做记录
//加入订单表做记录
wx.request({
url: url +
'Wx_AddOrder'
,
data: {
uname: getuser.data.nickName,
goods: that.data.goodsList[
0
].goods_name,
price: that.data.totalPrice,
openid:res.data,
},
success:
function
(lastreturn) {
console.log(
"存取成功"
);
}
})
},
})
},
'fail'
:
function
(res){
}
})
}
}
})
},
})
},
//后台
//微信支付 public function Wx_Pay(){ $request=Request::instance(); $fee=$request->param('fee'); $details=$request->param('details');//商品的详情，比如iPhone8，紫色 // $fee = 0.01;//举例充值0.01 $appid = 'appid';//appid $body = $details;// '金邦汇商城';//'【自己填写】' $mch_id = '1486742092';//'你的商户号【自己填写】' $nonce_str = $this->nonce_str();//随机字符串 $notify_url = 'https://zys.jinbh.cn/admin/Api/Wx_Speech';//回调的url【自己填写】'; $openid = $request->param('openid');//'用户的openid【自己填写】'; $out_trade_no = $this->order_number($openid);//商户订单号 $spbill_create_ip = '123.206.45.131';//'服务器的ip【自己填写】'; $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.com/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'];//统一下单接口返回的 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 $data要先排好顺序 public function sign($data) { $stringA = ''; foreach ($data as $key => $value) { if (!$value) continue; if ($stringA) $stringA .= '&' . $key . "=" . $value; else $stringA = $key . "=" . $value; } $wx_key = 'Zhangyusheng19810318015729366660';//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 $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; } //微信支付结束