Explication détaillée de l'interface d'arrière-plan php d'App WeChat Payment

/**
     * 格式化参数格式化成url参数
     */
    public function ToUrlParams()
    {
        $buff = "";
        foreach ($this->values as $k => $v)
        {            if($k != "sign" && $v != "" && !is_array($v)){
                $buff .= $k . "=" . $v . "&";
            }
        }

        $buff = trim($buff, "&");        return $buff;
    }

$input = new \app\wxpay\WxPayUnifiedOrder();//这里引用微信的统一下单接口

$input->SetBody($data['gname']['g_name']);//商品或支付单简要描述
$input->SetAttach($data['gname']['g_name']);//置附加数据 
$input->SetOut_trade_no($order_sn); // 商户订单号
$input->SetTotal_fee(intval($data['data']['order_price']*100)); 
$input->SetTime_start(date("YmdHis"));//订单生成时间
$input->SetTime_expire(date("YmdHis", time() + 600));//订单失效时间
$input->SetGoods_tag($data['gname']['g_name']); //商品标记  
$input->SetNotify_url("http://www.weixin.qq.com/wxpay/notify.php"); // 支付成功后的回调地址,
$input->SetTrade_type("APP");
$order = \app\wxpay\WxPayApi::unifiedOrder($input);return $order['prepay_id'];

$info = array();
//账号的信息一般都放在配置文件里面,用到的地方也很多
$info['appid'] = config('APP_APPID');
$info['partnerid'] = config('APP_MCHID');
$info['package'] = config('APP_PACKAGE');
$info['noncestr'] = $this->random_number();//生成随机数,下面有生成实例,统一下单接口需要
$info['timestamp'] = time();
$info['prepayid'] = $prepay_id;
$info['sign'] = self::_makeSign($info);//生成签名return $info;

//生成随机数
    public function random_number($len=21,$format='ALL' ){
        $is_abc = $is_numer = 0;
        $password = $tmp ='';
        switch($format){
            case 'ALL':
            $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';            break;
            case 'CHAR':
            $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';            break;
            case 'NUMBER':
            $chars='0123456789';            break;
            default :
            $chars='ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';            break;
        } // www.jb51.net
        mt_srand((double)microtime()*1000000*getmypid());        while(strlen($password)<$len){
            $tmp =substr($chars,(mt_rand()%strlen($chars)),1);            if(($is_numer <> 1 && is_numeric($tmp) && $tmp >0 )|| $format == &#39;CHAR&#39;){
                $is_numer = 1;
            }            if(($is_abc <> 1 && preg_match(&#39;/[a-zA-Z]/&#39;,$tmp)) || $format == &#39;NUMBER&#39;){
                $is_abc = 1;
            }
            $password.= $tmp;
        }        if($is_numer <> 1 || $is_abc <> 1 || empty($password) ){
            $password = $this->random_number($len,$format);
        }        return $password;
        }

    $notify = new PayNotifyCallBack();  
    $notify->Handle(false);

    final public function Handle($needSign = true)  
        {  
            $msg = "OK";  
            //当返回false的时候，表示notify中调用NotifyCallBack回调失败获取签名校验失败，此时直接回复失败  
            $result = WxpayApi::notify(array($this, 'NotifyCallBack'), $msg);  
            if($result == false){  
                $this->SetReturn_code("FAIL");  
                $this->SetReturn_msg($msg);  
                $this->ReplyNotify(false);  
                return;  
            } else {  
                //该分支在成功回调到NotifyCallBack方法，处理完成之后流程  
                $this->SetReturn_code("SUCCESS");  
                $this->SetReturn_msg("OK");  
            }  
            $this->ReplyNotify($needSign);  
        }

    $result = WxpayApi::notify(array($this, 'NotifyCallBack'), $msg);

    public static function notify($callback, &$msg)  
        {  
            //获取通知的数据  
            $xml = $GLOBALS['HTTP_RAW_POST_DATA'];  
            //如果返回成功则验证签名  
            try {  
                $result = WxPayResults::Init($xml);  
            } catch (WxPayException $e){  
                $msg = $e->errorMessage();  
                return false;  
            }  

            return call_user_func($callback, $result);  
        }

return call_user_func($callback, $result);

$this->SetReturn_code("SUCCESS");  
$this->SetReturn_msg("OK");

final private function ReplyNotify($needSign = true)  
    {  
        //如果需要签名  
        if($needSign == true &&   
            $this->GetReturn_code($return_code) == "SUCCESS")  
        {  
            $this->SetSign();  
        }  
        WxpayApi::replyNotify($this->ToXml());  
    }

$this->GetReturn_code($return_code) == "SUCCESS")

$this->GetReturn_code() == "SUCCESS")

//修改订单状态
    public function updateState($data){        if($data){
            $order_sn = $data['out_trade_no'];\

            $data = array();
            $data['order_id'] = $order_id;
            //修改订单状态(用curlpost方法请求至thinkphp目录下的Controller里面控制器里面的方法,修改状态)
            $url = 'www.test.com';
            header('content-type:text/html;charset=utf8');
            $curl = curl_init();
            curl_setopt($curl, CURLOPT_URL, $url);
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_POST, true);
            curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
            $result = curl_exec($curl);
            curl_close($curl);            if($result == 'success'){                return true;
            }else{                return false;
            }

        }
    }

$notify = new PayNotifyCallBack();
$notify->Handle(false);

//接受参数,修改状态
$xml = file_get_contents("php://input");
$data = json_decode(json_encode(simplexml_load_string($xml, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
$notify->updateState($data);