user_can_edit_post()
Whether user can edit a post.
WordPress 2.0.0 Hooks, Functions, Classes and Methods
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user_can_edit_post_comments()
Whether user can delete a post.
user_can_edit_post_date()
Whether user can delete a post.
user_can_edit_user()
Can user can edit other user.
user_can_richedit()
Whether the user can access the visual editor.
user_can_set_post_date()
Whether user can set new posts’ dates.
username_exists()
Determines whether the given username exists.
wp()
Set up the WordPress query.
wp_allow_comment()
Validates whether this comment is allowed to be made.
wp_cache_add()
Adds data to the cache, if the cache key doesn’t already exist.