Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Emitatoare si receptoare radio',
    'id' => '335',
    'filter1' => 'Iesiri%20tip%20releu%7C2%7C576',
    'filter2' => 'Iesiri%20open%20collector%7CNespecificat%7C1071',
    'filter3' => 'Distanta%20transmisie*%20(metri)%7C500%7C573',
];