Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Emitatoare si receptoare radio',
    'id' => '335',
    'filter1' => 'producator%7CHIKVISION%7C2',
    'filter2' => 'Iesiri%20tip%20releu%7C4%7C577',
];