Filters the data for a file before it is uploaded to WordPress.

Fires after a plugin has been activated.

Fires before an option is added.

Fires after a specific network option has been successfully added.

Fires immediately before an object-term relationship is added.

Fires immediately after meta of a specific type is added.

Fires after an option has been added.

Fires immediately after an object-term relationship is added.

Fires when scripts enqueued for the admin header for the legacy (pre-3.5.0) media upload popup are printed.

Filters the admin post thumbnail HTML markup to return.