private function strip(array $exceptions)
{
    $this->hosts = array_filter($this->hosts, function ($k) USE ($exceptions)
    {
        foreach ($exceptions AS $exception)
        {
            return (preg_match("/{$exception}/i", strtolower($k)))
                ? false
                : true;
        }
    }, ARRAY_FILTER_USE_KEY);

    print_r($this->hosts); die;
}


Array
(
    [admchef003] => 10.130.130.173
    [admcpmr001] => 10.130.128.27
    [admcpmx002] => 10.154.49.126
    [admemc01] => 10.133.117.60
    [admiasw003] => 10.154.23.178
    [admnlrs01] => 10.130.98.56
    [admnvom001] => 10.133.68.132
    [admnxks02] => 10.130.97.5
    [admnxrh001] => 10.133.113.14
    [admoemx001] => 10.158.15.234
    [admpupt003] => 10.154.105.250
    [admpupt101] => 10.154.23.114
    [admpupt201] => 10.154.105.31
    [admpupt301] => 10.154.105.112
    [admpupt303] => 10.154.105.37
    [admpupt401] => 10.142.48.164
    [admpupt402] => 10.142.47.152
    [admpupt403] => 10.142.48.194
    [admpupt404] => 10.142.67.34
    [admpupt405] => 10.142.68.4
    [admpupt501] => 10.133.83.101
    [admpupt502] => 10.133.83.102
    [admpupt503] => 10.133.83.103
    [admpupt504] => 10.133.83.158
    [admpvom001] => 10.154.39.218
    [admpxcp001] => 10.154.23.55
    [admpxcp003] => 10.154.23.148
    [admrlrs01] => 10.142.48.10
    [admrncp001] => 10.142.65.48
    [admrncp002] => 10.142.66.121
)