in_plugin_update_message- . $plugin_file, [ $this, expired_subscription_warning ], 10, 2 in_plugin_update_message- . $plugin_file, [ $this, expired_subscription_warning ], 10, 2 Share this:TweetLike this:Like Loading… Hook Type: actionSee hook in action See this hook used in plugins:Select Pluginwordpress-seo.28.1