How to insert variable in laravel 5.3 request?

Question

Laravel

Have a request

$img_link_id = Img_link::insertGetId(
                    ['name' => 'https://img.youtube.com/vi/$down_link_id/hqdefault.jpg']
);

What is the correct way to insert the $down_link_id variable into this request?

Answer 1

"https://img.youtube.com/vi/$down_link_id/hqdefault.jpg"

Use double quotes

Answer 2

$img_link_id = Img_link::insertGetId(
                    ['name' => "https://img.youtube.com/vi/{$down_link_id}/hqdefault.jpg"]
);

php.net/manual/en/language.types.string.php