diff --git a/pandora_console/include/functions_api.php b/pandora_console/include/functions_api.php
index a39d9da92a..68fc23a7ac 100644
--- a/pandora_console/include/functions_api.php
+++ b/pandora_console/include/functions_api.php
@@ -1,16 +1,33 @@
 <?php
 
-// Pandora FMS- http://pandorafms.com
-// ==================================================
-// Copyright (c) 2005-2021 Artica Soluciones Tecnologicas
-// Please see http://pandorafms.org for full contribution list
-// This program is free software; you can redistribute it and/or
-// modify it under the terms of the  GNU Lesser General Public License
-// as published by the Free Software Foundation; version 2
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+/**
+ * Functions for API.
+ *
+ * @category   Functions.
+ * @package    Pandora FMS
+ * @subpackage API.
+ * @version    1.0.0
+ * @license    See below
+ *
+ *    ______                 ___                    _______ _______ ________
+ *   |   __ \.-----.--.--.--|  |.-----.----.-----. |    ___|   |   |     __|
+ *  |    __/|  _  |     |  _  ||  _  |   _|  _  | |    ___|       |__     |
+ * |___|   |___._|__|__|_____||_____|__| |___._| |___|   |__|_|__|_______|
+ *
+ * ============================================================================
+ * Copyright (c) 2005-2021 Artica Soluciones Tecnologicas
+ * Please see http://pandorafms.org for full contribution list
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation for version 2.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * ============================================================================
+ */
+
+// Begin.
 global $config;
 
 // Set character encoding to UTF-8 - fixes a lot of multibyte character headaches
@@ -2300,13 +2317,13 @@ function api_set_delete_agent($id, $thrash1, $other, $returnType)
 
         foreach ($servers as $server) {
             if (metaconsole_connect($server) == NOERR) {
-                if ($other['data'][0] === '1') {
+                if ($agent_by_alias) {
                     $idAgent = agents_get_agent_id_by_alias($id);
                 } else {
                     $idAgent[0] = agents_get_agent_id($id, true);
                 }
 
-                if (!empty($idAgent)) {
+                if (empty($idAgent) === false) {
                     $result = agents_delete_agent($idAgent[0], true);
                 }