Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Solutii depistare febra',
    'id' => '359',
    'filter1' => 'Distanta%20detectie%7CNespecificat%7C820',
    'filter2' => 'producator%7CUNIVIEW%7C27',
    'filter3' => 'Detectie%7CNespecificat%7C817',
];