Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Surse de alimentare si UPS',
    'id' => '310',
    'filter1' => 'producator%7CDELTA%7C55',
    'filter2' => 'producator%7CMW%20Power%7C54',
];