w3tc_message_action_licensing_upgrade, array( $this, w3tc_message_action_licensing_upgrade w3tc_message_action_licensing_upgrade, array( $this, w3tc_message_action_licensing_upgrade Share this:TweetLike this:Like Loading… Hook Type: actionSee hook in action See this hook used in plugins:Select Pluginw3-total-cache.2.10.3