小程序后端支付代码亲测可用
<?php
namespace Home\Controller;
use Think\Controller; 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 = $out_trade_no."\n";
fwrite($myfile, $txt);
$txt = $openid."\n";
fwrite($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;
} }