What is this? MySQL array?

WordPress stores meta and option values in a serialized format if they are objects or arrays.

So what you have there is an array (a) with an integer (i) key 0 and a string (s) value with 82 characters.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)