如何使用php将数组变量（json数组）（reddit oauth）保存到数据库mysql中

I have a code to get user details from reddit using oauth :

$response = $client->fetch("https://oauth.reddit.com/api/v1/me.json");

When I print the result like :

print_r($response);

Result

Array
(
[result] => Array
    (
        [is_employee] => 
        [name] => Care_ishabell
        [created] => 1458655844
        [hide_from_robots] => 
        [is_suspended] => 
        [created_utc] => 1458627044
        [link_karma] => 1
        [in_beta] => 
        [comment_karma] => 0
        [over_18] => 
        [is_gold] => 
        [is_mod] => 
        [id] => wklr5
        [gold_expiration] => 
        [inbox_count] => 1
        [has_verified_email] => 
        [gold_creddits] => 0
        [suspension_expiration_utc] => 
    )

[code] => 200
[content_type] => application/json; charset=UTF-8
)

Now I want to store values in variables to insert into database. But when I try to store value in variables using :

$username = $response->result->name;

and echo it. Then it displays error :

Notice: Trying to get property of non-object in
G:\XAMPP\htdocs\aedditlogin\index.php on line 45

Notice: Trying to get property of non-object in
G:\XAMPP\htdocs\aedditlogin\index.php on line 45.

So help me to store values in variables, so that I can store them in database.

print_r($response); contain array of array, So instead of $response->result->name; use $response['result']['name']

Yes, @saty is right, also to answer the question in your subject, to store this in a database, just use json_encode function which will turn this array into a JSON string that you can save in you database.