Retrieves list of WordPress theme features (aka theme tags).

Gets all meta data, including meta IDs, for the given term ID.

Determine whether a site is the main site of the current network.

Check whether a usermeta key has to do with the current blog.

Returns a listing of all files in the specified folder and all subdirectories up to 100 levels deep.

Adds an admin notice alerting the user to check for confirmation request email after email address change.

Display JavaScript on the page.

Retrieves paginated links for archive post pages.

Outputs the HTML readonly attribute.

Validate a value based on a schema.