wp_insert (insert in DB) (tag)

wp_insert_attachment()

Adds a media file (attachment) to the WordPress media library. The file is not physically added — the function creates a post in the wp_posts table in the database and returns the ID of the created post.

wp_insert_category()

Inserts a new category into the database. Or updates an existing category by specifying a category ID.

wp_insert_comment()

Inserts/adds a comment into the database.

wp_insert_post()

Safely inserts/updates a post in the database.

wp_insert_term()

Adds a new taxonomy element (term, category) into a database.

wp_insert_user()

Creates a WordPress user in the Database.