Ajax handler for retrieving HTML for the featured image.

Ajax handler for installing a plugin.

Ajax handler for installing a theme.

Ajax handler for searching plugins to install.

Ajax handler for searching plugins.

Ajax handler for updating a theme.

Checks that a JSONP callback is a valid JavaScript callback name.

Converts a shorthand byte value to an integer byte value.

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

Displays or retrieves the HTML dropdown list of categories.