Sets the value of a query variable.

Retrieve the permalink structure for tags.

Sets the tag base for the tag permalink.

Escapes content by reference for insertion into the database, for security.

Prepares a SQL query for safe execution.

Replaces hrefs of attachment anchors with up-to-date permalinks.

Hook used to schedule publication for a post marked for the future.

Gets the subset of $terms that are descendants of $term_id.

Retrieves children of taxonomy as term IDs.

Updates category structure to old pre-2.3 from new taxonomy structure.