test.php

<?php
class A {
	public function b($username, $password)
	{
		$logged = $this->checkLogin($username, $password);
		
		if (!$logged || $this->noOfLogins++ >= 3) {
			echo "Konto zablokowane";
			return false;
		}
		
		if ($logged) {
			$this->noOfLogins = 0;
		}
		
		return $logged;
	}
}
// your code goes here