خواندن متغیر از داخل کلاس

سلام.
می خواستم بدونم اگه بخوام مقدار یک متغیر که در یک تابع و در یک فایل دیگه هست رو بخونم باید چکار کنم؟
ببینید در فایل زیر، میخوام مقدار متغیر $authority را همونطور که اضافه کردم رو قرار بدم. این متغیر از تابع دیگری در داخل کلاس دیگر و در فایل 2 قرار دارد  ، ممنون میشم بگین چگونه اینکارو بکنم.

فایل 1:

[PHP]<?php
class pec24 {
    var $code, $title, $description, $enabled;

// class constructor
    function pec24() {
      global $order;

      $this->code = 'pec24';
      $this->title = MODULE_PAYMENT_PEC24_TEXT_TITLE;
      $this->description = MODULE_PAYMENT_PEC24_TEXT_DESCRIPTION;
      $this->sort_order = MODULE_PAYMENT_PEC24_SORT_ORDER;
      $this->enabled = ((MODULE_PAYMENT_PEC24_STATUS == 'True') ? true : false);

      if ((int)MODULE_PAYMENT_PEC24_ORDER_STATUS_ID > 0) {
        $this->order_status = MODULE_PAYMENT_PEC24_ORDER_STATUS_ID;
      }
       
      $this->style_enabled = ((MODULE_PAYMENT_PEC24_STYLE_STATUS == 'True') ? true : false);

      if (is_object($order)) $this->update_status();

      $this->form_action_url = 'https://www.pec24.com/pecpaymentgateway/?au='.$authority;
    }

...
[/PHP]
فایل 2:

[PHP]<?php
//define required variables
define("_INCLUDE_DIR", "includes/classes/lib/");           //Path of required file for include (with full slash)
define("MERCHANT_ID", MODULE_PAYMENT_PEC24_MID);            //Merchant ID for settlement money.You must get one from Saman Bank Network
define("MERCHANT_PASSWORD", MODULE_PAYMENT_PEC24_MPASS);    //Password of Merchant ID for return money to customer.
define("PEC24_TABLE_RESERVATION", TABLE_PEC24_RESERVATION);  //Name of table in mysql database for store reservation data
define("PEC24_TABLE_ERECEIPT", TABLE_PEC24_ERECEIPT);        //Name of table in mysql database for store electronic receipt data
define("PEC24_TABLE_RETURNLOG", TABLE_PEC24_RETURNLOG);      //Name of table in mysql database for store all money return details

require_once(_INCLUDE_DIR."nusoap.php");

class pec24out {
  var $amount = 0;                       //Amount of money for transaction
  var $reservation = '';                 //A security number for access user
  var $merchantID = MERCHANT_ID;         //Your Merchant ID of Saman bank
  var $redirect = '';                    //User redirect to this URL after compietion transaction
  var $orderid;                          //ID of order for wist user and order after user redirect
  var $error_ok = False;
  var $errorstr = array();
  var $error_save_handele = 0;
   
  function pec24out($oid, $amo) {
    if ($amo <= 0) {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: Amount cannot be eaqual to or less than zero. ";
      $this->save_error();
    } else {
      $this->amount = $amo;
    }
    if ($oid <= 0) {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: You must enter a valid value for orderid of this payment.";
      $this->save_error();
    } else {
      $this->orderid = $oid;
      $this->orderid = $this->create_reservation();
    }

  }
   
  function set_redirect($url) {
    if (!eregi("^(http|https)+(:\/\/)+[a-z0-9_-]+\.+[a-z0-9_-]", $url)) {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: Invalid redirect URL.";
      $this->save_error();
    } else {
      $this->redirect = $url;
    }
  }
   
  function create() {

    if(trim($this->merchantID) == '') {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: you must enter a mechant id for post to transaction server.";
    }
    if(trim($this->redirect) == '') {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: You must enter a redirect URL for redirect user to your site after compietion transaction";
    }
    if(intval($this->amount) <= 0) {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: Amount cannot be eaqual to or less than zero. ";
    }
    if(intval($this->orderid) <= 0) {
      $this->error_ok = True;
      $this->errorstr[] = "Payment error: You must enter a valid value for orderid of this payment.";
    }
    if($this->error_ok == True) {
      $this->save_error();
      return False;
    }

      $soapclient = new soapclient('https://www.pec24.com/pecpaymentgateway/EShopService.asmx?wsdl','wsdl');
  if (!$err = $soapclient->getError())
   $soap***** = $soapclient->get*****() ;
   
  if ( (!$soapclient) OR ($err = $soapclient->getError()) ) {
    $error .= $err . "--<br />" ;
    echo $error ;
  } else {
    $this->orderid=generatePassword(5,false,false,true,false );
    $params = array(
                 'pin' => $this->merchantID ,  // this is our PIN NUMBER
                'amount' => intval($this->amount),
                'orderId' => $this->orderid,
                'callbackUrl' => $this->redirect,
                'authority' => 0,
                'status' => 1
              );
    $sendParams = array($params) ;
    $res = $soapclient->call('PinPaymentRequest', $sendParams);

    $authority = $res['authority'];
    $status = $res['status'];

    if ( ($authority) and ($status==0) )  {
    $output .= tep_draw_hidden_field('au', $authority);
    if(!@tep_db_query("INSERT INTO " .PEC24_TABLE_RESERVATION. " VALUES('','" .$this->orderid. "','" .$this->amount. "','" .$authority. "')")) {
      $this->error_ok = True;
      $this->errorstr[] = "MySQL error: you can't insert data to database.";
      $this->save_error();
      return False;
    }

    }
    else {
         
if ($err=$soapclient->getError()) 
       echo "ERROR = $err <br /> " ;
        $output .= "OrderID" . $params[orderId] . "<br>***Status:". $status . "--Au:" . $authority ."--"."Couldn't Validate Payment with Parsian<br> " . $this->errorstr[1] ;

    }
  }
    return $output;
  }
   
  function create_reservation() {
    $this->reservation = generatePassword(10,false,false,true,false);
    if(tep_db_query("SELECT * FROM " .PEC24_TABLE_RESERVATION)) {
      while(True) {
        $randreser = generatePassword(10,false,false,true,false);
        if(!tep_db_num_rows(tep_db_query("SELECT id FROM " .PEC24_TABLE_RESERVATION. " WHERE res_number='$randreser'"))) {
          break;
        }
      }
      $this->reservation = $randreser;
      return True;
    } else {
      $this->error_ok = True;
      $this->errorstr[] = "MySQL error: reservation table not found in database.";
    }
    $this->save_error();
    return False;
  }
   

....
[/PHP]

در فایلهای فوق همراه با ایجاد شی جدید چون نام تابع و کلاس یکیه ، تابع هم اجرا میشه ، چطور میتونم یک شی از کلاس pec24out تعریف کنم که نیاز نباشه بهش آرگومان بدم ، چراکه با ایجاد شی جدید تابع pec24out نیز فراخوانی میشه.

ممنون