Is there a way of posting or inserting content directly to the database (without entering the wp-admin)?

Question

Is there a way of for instance, insert a post and assign a category to it, without accessing Wordpress' back-end?

Answer 1

Yes @janoChen, you can use wp_insert_post,

take a look at this answers:

WP insert post PHP function and Custom Fields
Fron-End Post Submission