<?php
      class Wall
       {
         var $value1 = 'Bob';
         var $value2 = 'Bob_casa';
         var $username;
         var $password;
         var $time;
         var $question;
         var $login = false;

         function Wall($user,$pass)
          {
            $this->time = (date('G:i:s'));

            if($this->check_name($user))
              {
                $this->username = $user;
              }

            if($this->check_password($pass))
              {
                $this->password = $pass;
              }else{return false;}
          }

       private function check_password($pass)
         {
        if(!ereg("^[A-Za-z0-9_-]+$",$pass))
          {
            return false;
          }

        if(strlen($pass) > 32 || strlen($pass) < 5)
          {
        return false;
              }

        return true;
         }

       private function check_name($pass)
         {
       if(!ereg("^[A-Za-z0-9_-]+$",$pass))
         {
           return false;
         }

       if(strlen($pass) > 22 || strlen($pass) < 3)
         {
           return false;
             }

       return true;
         }

       function Login()
         {
           if($this->value1 == $this->username && $this->value2 == $this->password)
             {
               $this->login = true;
               echo '<br /><b class="correct">Login Correct ;)</b><br />';
             } else
                {
                  echo '<br /><b class="error">Login Failed .-.</b><br />'; return false;
                }
         }

       function Question()
         {
           $n1 = rand(21,100);
           $n2 = rand(1,20);
           $p = array('+','-');
           $keys = array_rand($p);
           $result =  $n1  .$p[$keys] .$n2 .'<br />';
         }

       function Out()
         {
            echo '<b>Username: </b><i>' .$this->username .'</i><br />' .'<b>Password: </b><i>' .$this->password .'</i><br />' .'<b>Ultimo accesso: </b><i>' .$this->time .'</i><br />';
         }

       function Error($n)
         {
           switch ($n)
             {
               case '0':
                echo '<br /> <b class="error"> Nessun comando inviato. </b> <br />';
                break;

               case '1':
                echo '<br /> <b class="error"> Comando non conosciuto. </b> <br />';
                break;

               case 'help':
                echo 'Per effettuare il login si deve inviare il seguente comando: Wall(Login,Username,Password)';
                break;
             }
         }

}
?>