[Wordpress] Some Code Function References

To interact with Wordpress database using PHP codes:

Insert Post
http://codex.wordpress.org/Function_Reference/wp_insert_post

Set Post Terms ( Tag or Category )
http://codex.wordpress.org/Function_Reference/wp_set_post_terms

Add Post Meta Field Data
(May be needed after added some plugins and would like to be compatible with them)
http://codex.wordpress.org/Function_Reference/add_post_meta

Create Post Category
http://codex.wordpress.org/Function_Reference/wp_create_category