Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Panouri exterioare',
    'id' => '342',
    'filter1' => 'Tip%20interfon%7CVideo%7C597',
    'filter2' => 'Comunicare%7CTCP%20IP%7C583',
    'filter3' => 'Montaj%7CAparent%7C594',
];