Error

PHP Noticeyii\base\ErrorException

Undefined offset: 2

$_GET = [
    'name' => 'Unitati stocare HDD %26 MicroSD',
    'id' => '307',
    'filter1' => 'Capacitate%7C3TB%7C273',
    'filter2' => 'Capacitate%7C1TB%7C271',
    'filter3' => 'Capacitate%7C4TB%7C274',
    'filter4' => 'Capacitate%7C2TB%7C272',
];