I have
```
class SessionUserService
{
	public function readSession(): ?array
	{
		$sessionId = $this->_sessionManager->getId();
		
		// other parts of the code...
		
		$sessionData = $this->fetchSessionData($sessionTokenKey);
		
		if ($sessionData === null)
		{
			return null;
		}
		
		// Get session record in DB
		$sessionUser = $this->getSession($sessionId);
			
		// Validate token match, IP/user-agent, expiration...
		if ($sessionUser !== null && !$sessionUser->isExpired() && 
			$this->validateSessionData($sessionData, $sessionUser) &&
			$this->validateRequest($sessionUser)
		)
		{
			return $sessionData;
		}
		
		$this->_logDebug("Session validation failed for session_id: {$sessionId}", [
			'session ID' => $sessionId,
		], 'read');
			
		return null;
	}

	public function validateRequest(SessionUser $sessionUser): bool
	{
		$currentIp = RoleHelper::userIp();
		$storedIp = $sessionUser->user_ip;
		$storedAgent = $sessionUser->user_agent ?? '';
		$currentAgent = RoleHelper::userAgent() ?? '';
		//$storedAgent = $this->normalizeUserAgent($sessionUser->user_agent ?? '');// TODO - Test in production
		//$currentAgent = $this->normalizeUserAgent(RoleHelper::userAgent() ?? '');
		
		$this->_logDebug("Stored IP and current IP:", [
			'stored user IP' => $storedIp,
			'current IP' => $currentIp,
		], 'validation');
			
		$this->_logDebug("Stored and current user agent:", [
			'stored user_agent' => $storedAgent,
			'current user_agent' => $currentAgent,
		], 'validation');
		
		if (!$this->ipMatches($storedIp, $currentIp))
		{
			$this->_logDebug("IP mismatch for session {$sessionUser->session_id}.", [
				'session' => $sessionUser->session_id,
				'stored user IP' => $storedIp,
				'current IP' => $currentIp,
			], 'validation');
			
			return false;
		}
		
		$storedAgent = $sessionUser->user_agent ?? '';
		
		// Simplified example: compare only first 30 character
		if (strncmp($storedAgent, $currentAgent, self::USER_AGENT_COMPARE_LENGTH) !== 0)
		{
			 $this->_logDebug("User-Agent mismatch for session {$sessionUser->session_id}.", [
			 	'session' => $sessionUser->session_id,
			 	'stored user_agent' => $storedAgent,
			 	'current user_agent' => $currentAgent,
			 	'stored agent prefix 30' => substr($storedAgent, 0, 30),
			 	'current agent prefix 30' => substr($currentAgent, 0, 30),
			 ], 'validation');
			
			return false;
		}
		
		return true;
	}
	
	/**
	* TODO
	* - test in production
	*
	* Normalize User Agent
	*/
	private function normalizeUserAgent(string $ua): string
	{
		// Convert to lowercase for case-insensitive comparison
		$uaClean = strtolower($ua);
		
		/**
		* Optionally remove digits but keep spaces and letters (tune based on your needs)
		* Commented out as versions can matter:
		*
		$uaClean = preg_replace('/[0-9]/', '', $uaClean);//*/
		
		/**
		* Remove excessive whitespaces and normalize spaces
		*/
		$uaClean = preg_replace('/\s+/', ' ', $uaClean);//*/
		
		/**
		* Remove common punctuation that may vary but is insignificant
		* Adjust to allow meaningful chars like dots and slashes if you want
		*
		$uaClean = preg_replace('/[\,;\(\)\[\]]/', '', $uaClean);//*/
		
		// Trim leading/trailing spaces
		$uaClean = trim($uaClean);
		
		return $uaClean;
	}
	
	/**
	* IP Matches
	* @param string $storedIp IP stored in DB.
	* @param string $currentIp Current IP from request.
	* @return bool Match result.
	*
	* Compares stored IP with current IP allowing /24 subnet matching for IPv4.
	*/
	private function ipMatches(string $storedIp, string $currentIp): bool
	{
		// IPv4 subnet matching example
		if (filter_var($storedIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) 
			&& filter_var($currentIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)
		)
		{
			return substr($storedIp, 0, strrpos($storedIp, '.')) === substr($currentIp, 0, strrpos($currentIp, '.'));
		}
		
		// Example IPv6 /64 comparison (first 4 blocks)
		if (filter_var($storedIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)
			&& filter_var($currentIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)
		)
		{
			$storedParts = explode(':', $storedIp);
			$currentParts = explode(':', $currentIp);
			
			return array_slice($storedParts, 0, 4) === array_slice($currentParts, 0, 4);
		}
		
		// Strict equality fallback for IPv6 or others
		return $storedIp === $currentIp;
	}
}
```

its used to validate session data and the concept is meant to:
Binding a session to an IP address can help ensure that if a session ID is stolen, the session cannot be hijacked from a different IP address.

The code works fine in itself, but I was thinking and wrote another line of code that connects with the code above:
```
class BaseController extends Controller
{
	public function beforeAction($action): bool
	{
		if (!parent::beforeAction($action))
		{
			return false;
		}
		
		$sessionId = \Yii::$app->session->getId();
		$sessionData = $this->_sessionUser->readSession();
		
		if ($sessionData !== null)
		{
			$userIpSession = $sessionData['user_ip'] ?? null;
			$userAgentSession = $sessionData['user_agent'] ?? null;
			$userIpCurrent = $this->_userIp;
			$userAgentCurrent = $this->_userAgent;
			
			// Minimal length to compare
			$compareLength = 50;
			
			// Prepare substrings of length up to compareLength
			$storedSub = substr($userAgentSession, 0, $compareLength);
			$currentSub = substr($userAgentCurrent, 0, $compareLength);
			
			// Compare IP and User Agent
			if ($userIpSession !== $userIpCurrent || $storedSub !== $currentSub)
			{
				// Consider logging user IP and Agent differences here for audit
				LogHelper::info(
					"Session invalidated due to IP/User-Agent mismatch.", [
						'user session ip' => $userIpSession,
						'user current ip' => $userIpCurrent,
						'user session agent' => $userAgentSession,
						'user current agent' => $userAgentCurrent,
						'method' => __METHOD__
				]);
				
				// Invalidate session, clear cart, logout
				$this->_sessionUser->invalidate($sessionId);
				$this->_sessionCart->clearCart();
				
				// Destroy all session data will be removed
				RoleHelper::userLogout(true);
				
				AlertHelper::setFlash(
					'warning',
					\Yii::t('app', 'Your session has expired or was invalidated. Please log in again.'),
					3000
				);
			
				\Yii::$app->response->redirect(['site/login'])->send();
			
				return false;
			}
		}
	}
}
```

Now I dont need the beforeAction() if I just update the validation within user session to also do the following:

$this->_sessionUser->invalidate($sessionId);
$this->_sessionCart->clearCart();

RoleHelper::userLogout(true);

so I was thinking if we refactor the validation code to add a bool if the data does not match.. then log and return false if bool is true?