save multi-select input using update_option for plugin

If $_POST['exclude_posts'] is an array but you need to store it as a string, you can always use a function like serialize() and unserialize() to turn it into a string and vice versa.

http://php.net/manual/en/function.serialize.php

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