Removes option by name. Prevents removal of protected WordPress options.

Calls the callback functions that have been added to an action hook.

Sends pings to all of the ping site services.

Retrieve all options as it was for 1.2.

Returns or Prints link to the author’s posts.

Print/Return link to author RSS feed.

Retrieve category children list separated before and after the term IDs.

Retrieves category parents with separator.

Print/Return link to category RSS2 feed.

Given a date in UTC or GMT timezone, returns that date in the timezone of the site.