จะเรียก php function ภายใน class อย่างไรคะ ผ่าน Url

<?php
//KitchenController.php
Class Controller extends ConnectDb

<?php
//active.php
include "KitchenController.php";
$ctrl=new Controller();
$ctrl->fncUpdateType() ;

$db = new Controller(DB_HOST,DB_USER,DB_PASS,DB_NAME);

//ตรงนี้

<a href="http://localhost/shellsoft/KitchenController?test.php?">test</a>

 $db->strTable = "shell_queue";
         $db->Orderby = "QueNo";
          $queryQue = $db->fncSelectQueue();
          while($table = mysql_fetch_array($queryQue)){
             
           ?>
          <div class="col-xs-7 col-lg-5">
   
          <h2><?php echo $table[QueTable]; ?></h2>
          <table class="table">
              <tr>
                  <th>รหัส</th>
                  <th>รายการ</th>
                  <th>จำนวน</th>
                  <th>สถานะ</th>
                  <th></th>
                  <th></th>
                 
              </tr>
             <?php 
              $db->strTable = "shell_kitchen";
              $db->strCondition = "KitchTable = '".$table[QueTable]."'";
              $queryMenu = $db->fncSelectMenu();
              while($menu = mysql_fetch_array($queryMenu)){
              ?>
              <tr>
                  <td><?php echo $menu[KitchFoodID]; ?></td>
                  <td><?php echo $menu[KitchName]; ?></td>
                  <td><?php echo $menu[KitchQuan]; ?></td>
                  <td style="width: 10px;">
                      <span id="sType_<?php echo $menu[KitchFoodID] ?>"><?php echo $menu[KitchType]; ?></span>
                  </td>
                  <td>
<input type="submit" value="Cook" onclick="fncSetStatus('<?php echo $menu[KitchFoodID] ?>','Cooking..');">
</td>
                  <td>
<input type="submit" value="Finish" onclick="fncSetStatus('<?php echo $menu[KitchFoodID] ?>','Finish');">
</td>
                  </tr>
              
            <?php 
              }
             ?>
           </table>

class ConnectDb {
    
               public function __construct($host,$user,$pass,$db_name)
		{
				$Connect = mysql_connect($host,$user,$pass) or die(mysql_error());				
				mysql_query("SET NAMES utf8");
				mysql_select_db($db_name);			   
		}
    
    
}

if(isset($_REQUEST['test_call'])){
              $this->test();
              exit;
   }

require_once("KitchenController.php");
	if(isset($_GET[fncUpdateType])){
		$int_kit=new Controller();
		$int_kit->fncUpdateType();
	}