Error

PHP Noticeyii\base\ErrorException

Undefined variable: fil

$_GET = [
    'url1' => 'phone',
    'url2' => '1',
    'url3' => 'lenovo',
    'url4' => 'vibe_c',
];

$_SESSION = [
    '__flash' => [],
    'city' => 'almaty',
];