Check user if subscribed to my channel

Hi, Barri, I don’t know if you can help me, I’ve been eating my head for two days, how can I save this JSON in a database, thank you.

object(stdClass)#4 (12) {
[“broadcaster_id”]=>
string(9) “507703972”
[“broadcaster_login”]=>
string(12) “ragnarok1978”
[“broadcaster_name”]=>
string(12) “ragnarok1978”
[“gifter_id”]=>
string(0) “”
[“gifter_login”]=>
string(0) “”
[“gifter_name”]=>
string(0) “”
[“is_gift”]=>
bool(false)
[“plan_name”]=>
string(36) “Suscripción de canal (ragnarok1978)”
[“tier”]=>
string(4) “1000”
[“user_id”]=>
string(9) “540802131”
[“user_name”]=>
string(16) “adrifortnite2020”
[“user_login”]=>
string(16) “adrifortnite2020”
}

the JSON is brought from:

file_put_contents(DIR . ‘/auth.json’, $r, JSON_PRETTY_PRINT);