Add hook to fire purge_all for any caching type

Author: Julien-prrs

admin/class-nginx-helper-admin.php

@@ -717,6 +717,13 @@ public function purge_all() {
 				break;
 		}
 
+		/**
+		 * Fire an action after the cache has been purged whatever caching type is used'
+		 * 
+		 * @since 2.2.2
+		 */
+		if ( 'purge' === $action ) do_action( 'rt_nginx_helper_after_purge_all' );
+
 		wp_redirect( esc_url_raw( $redirect_url ) );
 		exit();