How to Check Url Access In YII for Role based Access

Below function return true and false(1 or null) either yii user is able to access the url(authItemName) or not.

Explample.
Player list
$url = http://localhost/YiiProject/index.php?r=player/playerList/index
$allowedAccess = $this->checkUrlAccess($url );
if($allowedAccess){
 echo "You are allowed to access Url";
}else{
 echo 'Access denied';
}
function checkUrlAccess($authItemName)
  {
     #New Code ADDED            
            $allowedAccess='';
        if (strpos($authItemName, '?r=') != false)
        {
                   
            $urlQueryString=explode('?r=',$authItemName);          
            if (strpos($urlQueryString[1], '/') != false)
            {
                $parts = explode('/', $urlQueryString[1]);
                if ($this->upperCaseFirstLetter)
                {
                  foreach ($parts as $i => $part)
                  {
                    $parts[$i] = ucfirst($part);
                  }
                }
                $moduleName=$controllerName=$actionName='';
                $numOfParts = count($parts);
                if ($numOfParts > 2)
                {
                  $moduleName=$parts[$numOfParts - 3];
                }
                                $controllerName=$parts[$numOfParts - 2];
                $actionName=$parts[$numOfParts - 1];
                                $itemName = '';                   
                                 if(!empty($moduleName)){
                                         $itemName .= $moduleName . '.';
                                 }
                                 $itemName .= $controllerName;
                 $user = Yii::app()->getUser();
                 if ($user->isGuest){
                           if(empty($moduleName)){
                               $allowedAccess =   Yii::app()->beforeControllerAction($controllerName,$actionName);
                                             }
                 }else{
                      if ($user->checkAccess($itemName . '.*')){
                         $allowedAccess = 1;
                      }else{
                          $itemName .= '.' . $actionName;
                          if ($user->checkAccess($itemName, array())){
                              $allowedAccess = 1;
                          }
                      }
                                            if(empty($moduleName) && empty($allowedAccess)){
                                                $allowedAccess =   Yii::app()->beforeControllerAction($controllerName,$actionName);
                                             }
                 }
          
             }
        }
        #END
                return $allowedAccess;
   
  }