Returns the language for a language code.

Returns the content for the help sidebar on the Edit Site screens.

Returns the arguments for the help tab on the Edit Site screens.

Generates and displays a drop-down of available languages.

Outputs the HTML for a network’s “Edit Site” tabular interface.

Print JavaScript in the header on the Network Settings screen.

Cleans the user cache for a specific user.

Displays an admin notice to upgrade all sites after a core upgrade.

Synchronizes category and post tag slugs when global terms are enabled.

Check whether a site has used its allotted upload space.