Function: Prints resource hints to browsers for pre-fetching, pre-rendering and pre-connecting to web sites.

Function: Retrieves a list of unique hosts of all enqueued scripts and styles.

Function: Determines whether the user can access the visual editor.

Function: Retrieves the time at which the post was last modified.

Function: Fires the wp_head action.

Function: Fires the wp_footer action.

Function: Displays the links to the general feeds.

Function: Displays the links to the extra feeds such as category feeds.