微信小程式支付

<?php

class wxpay{

protected $mch_id;

protected $key;

protected $openid;

protected $out_trade_no;

protected $body;

protected $total_fee;

protected $notifyurl;

protected $unfiedorderurl;

protected $trade_type;

$this->mch_id=$mch_id;

$this->openid = $openid;

$this->key = $key;

$this->out_trade_no = $out_trade_no;

$this->body = $body;

$this->total_fee = $total_fee;

$this->notifyurl=$notifyurl;

$this->unfiedorderurl=$unifiedorderurl;

$this->trade_type=$trade_type;

public function pay(){

//統一下單介面

$unifiedorader=$this->unifiedorder();

$parameters=array(

'timestamp'=>''.time().'',

'noncestr'=>$this->createnoncestr(),

'package' =>'prepay_id='.$unifiedorader['prepay_id'],

'signtype'=>'md5'

$parameters['paysign']=$this->getsign($parameters);

//返回商戶號

$parameters['out_trade_no']=$this->out_trade_no;

return $parameters;

public function unifiedorder(){

$parameters=array(

'mch_id'=>$this->mch_id,

'nonce_str'=>$this->createnoncestr(),

'body'=>$this->body,

'out_trade_no'=>$this->out_trade_no,

'total_fee'=>$this->total_fee,

'spbill_create_ip'=>$_server['remote_addr'],

'notify_url'=> $this->notifyurl,

'trade_type'=>$this->trade_type

if($this->trade_type=='jsapi')

$parameters['openid']=$this->openid;

ksort($parameters);

$parameters['sign']=$this->getsign($parameters);

$xmldata=$this->arraytoxml($parameters);

$return=$this->xmltoarray($this->postxmlcurl($xmldata,$this->unfiedorderurl,60));

return $return;

private function postxmlcurl($xml,$url,$second=30){

$ch=curl_init();

//超時

curl_setopt($ch,curlopt_timeout,$second);

curl_setopt($ch,curlopt_url,$url);

curl_setopt($ch, curlopt_ssl_verifypeer, false);

curl_setopt($ch, curlopt_ssl_verifyhost, false); //嚴格校驗

curl_setopt($ch, curlopt_header, false);

curl_setopt($ch, curlopt_returntransfer, true);

curl_setopt($ch, curlopt_post, true);

curl_setopt($ch, curlopt_postfields, $xml);

curl_setopt($ch, curlopt_connecttimeout, 20);

curl_setopt($ch, curlopt_timeout, 40);

set_time_limit(0);

$data=curl_exec($ch);

if($data){

curl_close($ch);

return $data;

else{

$error=curl_errno($ch);

curl_close($ch);

throw new exception("出錯，出錯碼".$error);

public static function xmltoarray($xml){

//xml轉array

libxml_disable_entity_loader(true);

$xmlstring = ******xml_load_string($xml, '******xmlelement', libxml_nocdata);

$val=json_decode(json_encode($xmlstring),true);

return $val;

public static function arraytoxml($arr){

//陣列轉換成xml

$xml="";

foreach ($arr as $k=>$v){

$xml.='<'.$k.'>'.$v.'';

$xml.='';

return $xml;

public static function createnoncestr($strlength=32){

//建立隨機字串

$strings='abcdefghijklmnopqrstuvwxyz0123456789';

$noncestr='';

for($i=0;$i<$strlength;$i++)

$noncestr.=$strings[mt_rand(0,35)];

return $noncestr;

private function getsign($obj){

//生成簽名

foreach ($obj as $k=>$v){

$copyparameters[$k]=$v;

//步驟一：按字典排序引數

$string=$this->formatbizqueryparamap($copyparameters,false);

//步驟二：在string後面加key

$string.='key='.$this->key;

//步驟三：md5加密

$string=md5($string);

//步驟四：轉大小寫

return strtoupper($string);

private function formatbizqueryparamap($paramap,$urlencode){

//格式化引數

$buff="";

ksort($paramap);

foreach ($paramap as $k=>$v){

if($urlencode){

$v=urlencode($v);

$buff.=$k.'='.$v.'&';

return $buff;

小程式微信支付

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