//first users group
    if (
            $user == $username[1] && $pass == $password[1] ||
            $user == $username[2] && $pass == $password[2] ||
            $user == $username[3] && $pass == $password[3] ||
            $user == $username[4] && $pass == $password[4] ||
            $user == $username[5] && $pass == $password[5]
        ) {
        $_SESSION['conneted']=$user;
        header("Location: http://avifix.info/Test/ok.php"); 
    }
    
    //second users group
    elseif (
            $user == $username[6] && $pass == $password[6] ||
            $user == $username[7] && $pass == $password[7] ||
            $user == $username[8] && $pass == $password[8] ||
            $user == $username[9] && $pass == $password[9] ||
            $user == $username[10] && $pass == $password[10]
        ) {
        $_SESSION['conneted']=$user;
        header("Location: http://avifix.info/Test/ok.php"); 
    
    }
    
    //wrong username and password
    else {
        echo "<h4 align=center>$text2</h4>";
    }