Many Wordpress functions follow naming conventions, probably the most well known of these would be the the_*() functions, such as the_post(), used in The Loop.
Obviously the is_*() family of functions belong to the Conditionals. However, what are the common themes represented by the following function prefixes:
add_*()register_*()wp_*()wp_insert_*()
It seems to me that the wp_insert_*() functions all perform INSERT statements on the database. That is, they change the state of the application. Is this correct?
It seems to me that the register_*() functions do not affect the database. That is, they make constructs available for the current page call only. Is this correct?
Is there a common theme for the wp_*() functions? Is this just an old pseudo-namespace that is no longer enforced?
The add_*() functions seem to be the most illogical. Some affect the database, such as add_post_meta(), and some don't add_theme_support(). What is common among the add_*() functions, and why aren't they called i.e. wp_insert_post_meta() and register_theme_support() for consistency?
