Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Panouri exterioare',
    'id' => '342',
    'filter1' => 'Tip%20interfon%7CVideo%7C597',
    'filter2' => 'Nr.%20posturi%20(familii)%7C255%7C592',
    'filter3' => 'Nr.%20posturi%20(familii)%7C4%7C590',
];