Dynamically getting tags in post edit screen

I know this is but a patch, but i followed WebElaine advise and hooked my function to the “save_post” hook.
As I wanted my plugin to be used while editing the post, I have added button to update the tags that actually saves the post.

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