小程序支付，沒有封裝支付代碼：直接上一段可用的流程代碼吧：
微信小程序支付官網文檔有詳細的說明，這里我就不再贅述啦：
客戶端js:

wx.request({ url:'https://www.xxxx.com/order/store',//改成你自己的鏈接 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) } });

后端部分：laravel5:<?php

namespace App\Http\Controllers\Api\Order; use App\Models\Order; use App\Models\OrderGoods; use Illuminate\Http\Request; use App\Http\Controllers\Controller; use App\Models\Member; use App\Models\MemberAddress; use App\Models\Product; use App\Http\Requests; use App\Http\Requests\Interfaces\MemberCheck; use Carbon\Carbon; class OrderController extends Controller {use MemberCheck;public function __construct(){$config = array('appid' => env('WECHAT_APPID'),//小程序appid'pay_mchid' => env('WECH_ID'),//商戶號'pay_apikey' =>env('WECHAT_KEY'),//可在微信商戶后臺生成支付秘鑰 );$this->config = $config;}/*** 生成訂單號* @author lxhui<772932587@qq.com>* @since 1.0* @return array*/private static function trade_no() {list($usec, $sec) = explode(" ", microtime());$usec = substr(str_replace('0.', '', $usec), 0 ,4);$str = rand(10,99);return date("YmdHis").$usec.$str;}/*** order* @author lxhui<772932587@qq.com>* @since 1.0* @return array*/public function store(Request $request ){\DB::beginTransaction();try{if( !$this->checkMember(['openid'=>$request->openid]))return response()->json(['code'=>200,'status'=>0,'message'=>'該openid未注冊']);$config = $this->config;$result =json_decode($request->apiParams,true);if( !$result['addressInfo'])return response()->json(['code'=>200,'status'=>0,'message'=>'收貨地址不能為空']);if( !$result['orderInfo'])return response()->json(['code'=>200,'status'=>0,'message'=>'訂單商品不能為空']);$address_data = ['openid'=>$request->openid,'realname'=>$result['addressInfo']['userName'],'mobile'=>$result['addressInfo']['telNumber'],'province'=>$result['addressInfo']['provinceName'],'city'=>$result['addressInfo']['cityName'],'area'=>$result['addressInfo']['countyName'],'address'=>$result['addressInfo']['detailInfo'],'zipcode'=>$result['addressInfo']['postalCode'],];$model = MemberAddress::firstOrCreate($address_data);$productArray =$result['orderInfo'];$products = [];$orderProducts = [];$productsFee = 0.0; //支付商品總價foreach ($productArray as $val) {$product = Product::find($val['goodsid']);$productsFee += $product->marketprice * $val['total'];}// 計算價格$shippingFee = 10.0;$totalFee = $productsFee + $shippingFee;// 創建訂單$ordersn = self::trade_no();$order = new Order();$order->ordersn = $ordersn;$order->openid = $request->openid;$order->price = $totalFee;$order->goodsprice = $totalFee;$order->createtime =time();$order->addressid = $model->id;$order->storeid = $request->storeid;$order->save();$orderid = $order->id;$order_goods = new OrderGoods();foreach ($productArray as $val) {$product = Product::find($val['goodsid']);$product=['orderid'=>$orderid,'goodsid'=>$val['goodsid'],'price'=>$product->marketprice,'total'=>$val['total'],'openid'=>$request->openid];array_push($products, $product);}/* 生產預訂單參數 */$openid = $request->openid;$body = '商城訂單';$order_sn = $ordersn;$total_fee = $totalFee;//統一下單參數構造$unifiedorder = array('appid' => $config['appid'],'mch_id' => $config['pay_mchid'],'nonce_str' => self::getNonceStr(),'body' => $body,'out_trade_no' => $order_sn,'total_fee' => $total_fee * 100,'spbill_create_ip' => $request->getClientIp(),'notify_url' => 'https://'.$_SERVER['HTTP_HOST'].'/Api/Wxpay/notify',// 支付微信回調的url，可自定義,非必須'trade_type' => 'JSAPI','openid' => $request->openid,//'oIXoL0ZpfG3NdSE8Qa-S1GcEHJGY'//測試openid );$unifiedorder['sign'] = self::makeSign($unifiedorder);//請求數據$xmldata = self::array2xml($unifiedorder);$url = 'https://api.mch.weixin.qq.com/pay/unifiedorder';$res = self::curl_post_ssl($url, $xmldata);if(!$res){return response()->json(['code'=>200,'status'=>0,'message'=>'無法連接服務器']);//self::return_err("Can't connect the server"); }//file_put_contents是用來查看服務器返回的結果 測試完可以刪除了,可以使用laravel自帶日志功能//file_put_contents('/public/log.txt',$res,FILE_APPEND);
　　　　　　　　\Log::info(json_encode($res));
$content = self::xml2array($res);$result_code= isset($content['result_code']) ? $content['result_code'] : '';$return_code = isset($content['return_code']) ? $content['return_code'] : '';if(strval($result_code) == 'FAIL'){return self::return_err(strval($content['err_code_des']));}if(strval($return_code) == 'FAIL'){return self::return_err(strval($content['return_msg']));}$data = $this->pay($content['prepay_id']);\DB::table("eshop_order_goods")->insert($products);\DB::commit();return response()->json(['code'=>200,'status'=>1,'message'=>'提交成功','data'=>$data]);} catch (\Exception $e){\DB::rollback();//事務回滾return response()->json(['code'=>200,'status'=>0,'message'=>$e->getMessage()]);}}/*** 進行支付接口簽名* @param string $prepay_id 預支付ID(調用prepay()方法之后的返回數據中獲取)* @return json的數據*/public function pay($prepay_id){$config = $this->config;$data = array('appId' => $config['appid'],'timeStamp' => time(),'nonceStr' => self::getNonceStr(),'package' => 'prepay_id='.$prepay_id,'signType' => 'MD5');$data['paySign'] = self::makeSign($data);return $data;}//微信支付回調驗證public function notify(){$xml = $GLOBALS['HTTP_RAW_POST_DATA'];// 這句file_put_contents是用來查看服務器返回的XML數據 測試完可以刪除了//file_put_contents(APP_ROOT.'/Statics/log2.txt',$res,FILE_APPEND);//將服務器返回的XML數據轉化為數組$data = self::xml2array($xml);// 保存微信服務器返回的簽名sign$data_sign = $data['sign'];// sign不參與簽名算法unset($data['sign']);$sign = self::makeSign($data);// 判斷簽名是否正確 判斷支付狀態if ( ($sign===$data_sign) && ($data['return_code']=='SUCCESS') && ($data['result_code']=='SUCCESS') ) {$result = $data;//獲取服務器返回的數據$order_sn = $data['out_trade_no']; //訂單單號$openid = $data['openid']; //付款人openID$total_fee = $data['total_fee']; //付款金額$transaction_id = $data['transaction_id']; //微信支付流水號//更新數據庫$this->updateDB($order_sn,$openid,$total_fee,$transaction_id);}else{$result = false;}// 返回狀態給微信服務器if ($result) {$str='<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';}else{$str='<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[簽名失敗]]></return_msg></xml>';}echo $str;return $result;}//---------------------------------------------------------------用到的函數------------------------------------------------------------/*** 錯誤返回提示* @param string $errMsg 錯誤信息* @param string $status 錯誤碼* @return json的數據*/protected function return_err($errMsg='error',$status=0){return response()->json(['code'=>200,'result'=>'fail','status'=>$status,'errmsg'=>$errMsg]);}/*** 正確返回* @param array $data 要返回的數組* @return json的數據*/protected function return_data($data=array()){return response()->json(['code'=>200,'result'=>'success','status'=>1,'data'=>$data]);}/*** 將一個數組轉換為 XML 結構的字符串* @param array $arr 要轉換的數組* @param int $level 節點層級, 1 為 Root.* @return string XML 結構的字符串*/protected function array2xml($arr, $level = 1) {$s = $level == 1 ? "<xml>" : '';foreach($arr as $tagname => $value) {if (is_numeric($tagname)) {$tagname = $value['TagName'];unset($value['TagName']);}if(!is_array($value)) {$s .= "<{$tagname}>".(!is_numeric($value) ? '<![CDATA[' : '').$value.(!is_numeric($value) ? ']]>' : '')."</{$tagname}>";} else {$s .= "<{$tagname}>" . $this->array2xml($value, $level + 1)."</{$tagname}>";}}$s = preg_replace("/([\x01-\x08\x0b-\x0c\x0e-\x1f])+/", ' ', $s);return $level == 1 ? $s."</xml>" : $s;}/*** 將xml轉為array* @param string $xml xml字符串* @return array 轉換得到的數組*/protected function xml2array($xml){//禁止引用外部xml實體libxml_disable_entity_loader(true);$result= json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);return $result;}/**** 產生隨機字符串，不長于32位* @param int $length* @return 產生的隨機字符串*/protected function getNonceStr($length = 32) {$chars = "abcdefghijklmnopqrstuvwxyz0123456789";$str ="";for ( $i = 0; $i < $length; $i++ ) {$str .= substr($chars, mt_rand(0, strlen($chars)-1), 1);}return $str;}/*** 生成簽名* @return 簽名*/protected function makeSign($data){//獲取微信支付秘鑰$key = $this->config['pay_apikey'];// 去空$data=array_filter($data);//簽名步驟一：按字典序排序參數ksort($data);$string_a=http_build_query($data);$string_a=urldecode($string_a);//簽名步驟二：在string后加入KEY//$config=$this->config;$string_sign_temp=$string_a."&key=".$key;//簽名步驟三：MD5加密$sign = md5($string_sign_temp);// 簽名步驟四：所有字符轉為大寫$result=strtoupper($sign);return $result;}/*** 微信支付發起請求*/protected function curl_post_ssl($url, $xmldata, $second=30,$aHeader=array()){$ch = curl_init();//超時時間curl_setopt($ch,CURLOPT_TIMEOUT,$second);curl_setopt($ch,CURLOPT_RETURNTRANSFER, 1);//這里設置代理，如果有的話//curl_setopt($ch,CURLOPT_PROXY, '10.206.30.98');//curl_setopt($ch,CURLOPT_PROXYPORT, 8080);curl_setopt($ch,CURLOPT_URL,$url);curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,false);if( count($aHeader) >= 1 ){curl_setopt($ch, CURLOPT_HTTPHEADER, $aHeader);}curl_setopt($ch,CURLOPT_POST, 1);curl_setopt($ch,CURLOPT_POSTFIELDS,$xmldata);$data = curl_exec($ch);if($data){curl_close($ch);return $data;}else {$error = curl_errno($ch);echo "call faild, errorCode:$error\n";curl_close($ch);return false;}}}

返回結果：

{"code": 200,"status": 1,"message": "提交成功","data": {"appId": "wxaxxxxxxxxxxxxx","timeStamp": 1499497335,"nonceStr": "qqejagkybrh9rxmyfosze71qs49ppcub","package": "prepay_id=wx2017070815022850d11adcb80558793405","signType": "MD5","paySign": "285BCE1F0B93701D927FA5F6CBE10E86"} }

代碼沒有完美封裝，博友們如果有一套好的封裝，請留下共享地址哈啊

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