小程序后端支付代码亲测可用
<?php namespace HomeController; use ThinkController; class WechatpayController extends Controller { //微信支付 public function pay() { //参数定义 $appid='111111'; $appsecret='1111111'; $mch_id='1111111'; $notify_url='https://www.123.com/index.php/Home/Wechatpay/wechatNotify/'; //获取openid /*if(I("post.userid")) { $infos=M('weixin_users')->find(I("post.userid")); $openid = $infos->openid; }*/ $openid='oOnZO5Q8OBzoZYj-1CW_6c1S86zA'; //支付相关设置 //$fee = I("post.total_fee"); $fee = 0.01;//举例支付0.01 $body ='test'; $nonce_str=$this->nonce_str();//随机字符串 $out_trade_no = $this->order_number();//商户订单号 $spbill_create_ip = '47.105.151.242';//服务器的ip【自己填写】; $total_fee =$fee*100;// 微信支付单位是分，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 $post['trade_type'] = $trade_type; //插入微信支付表 $pay=M('weixin_pay'); $count=$pay->where("out_trade_no='".$out_trade_no."'")->count(); $sign = $this->sign($post);//签名 if($count==0) { $data=array(); $data['out_trade_no']=$out_trade_no; $data['status']=1; $data['create_time']=time(); $data['sign']=$sign; $data['openid']=$openid; $data['total_fee']=$total_fee; $data['trade_type']=$trade_type; $data['notify_url']=$notify_url; $pay->add($data); } $post_xml = '<xml> <appid>'.$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>'; //var_dump($post_xml); //print_r($post_xml);die; //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 //print_r($array); if($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'] = 200; $data['timeStamp'] = "$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 $data要先排好顺序 private function sign($data){ $stringA = ''; foreach ($data as $key=>$value){ if(!$value) continue; if($stringA) $stringA .= '&'.$key."=".$value; else $stringA = $key."=".$value; } //echo $stringA; $wx_key='1111111';//申请支付后有给予一个商户账号和密码，登陆后自己设置的key $stringSignTemp = $stringA.'&key='.$wx_key; return strtoupper(md5($stringSignTemp)); } //curl请求 public function http_request($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 $output; } //获取xml private function xml($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; } public function wechatNotify() { //存储微信的回调 $xml = file_get_contents("php://input"); $arr = $this -> XmlToArr($xml); $out_trade_no = $arr['out_trade_no']; $openid=$arr['openid'];//openid $sign=$arr['sign'];//校验码 $total_fee=$arr['total_fee'];//订单金额 $transaction_id=$arr['transaction_id'];//微信支付号 $pay=M('weixin_pay'); $count=$pay->where(array('out_trade_no'=>$out_trade_no))->count(); $myfile = fopen("newfile.txt", "w") or die("Unable to open file!"); $txt = $out_trade_no." "; fwrite($myfile, $txt); $txt = $openid." "; fwrite($myfile, $txt); $txt='count:'.$count; fwrite($myfile, $txt); fclose($myfile); if($count==1) { $info=$pay->where(array('out_trade_no'=>$out_trade_no))->field('id,openid,total_fee')->find(); if($info['openid']==$openid && $total_fee==$info['total_fee']) { //更新微信支付表 $data=array(); $data['update_time']=time(); $data['status']=2; $data['transaction_id']=$transaction_id; $pay->where("openid='".$openid."' and out_trade_no='".$out_trade_no."'")->save($data); } } echo 'success'; } private function XmlToArr($xml) { if($xml == '') return ''; libxml_disable_entity_loader(true); $arr = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true); return $arr; } }