diff --git a/pandora_console/extensions/quick_shell.php b/pandora_console/extensions/quick_shell.php
index 9ea79ba364..2f45e19606 100644
--- a/pandora_console/extensions/quick_shell.php
+++ b/pandora_console/extensions/quick_shell.php
@@ -273,6 +273,14 @@ function buildConnectionURL($method)
 {
     global $config;
 
+    if (isset($config['gotty_ssh_use_ssl']) === false) {
+        $config['gotty_ssh_use_ssl'] = '';
+    }
+
+    if (isset($config['gotty_telnet_use_ssl']) === false) {
+        $config['gotty_telnet_use_ssl'] = '';
+    }
+
     $address = (empty($config['gotty_addr']) === true) ? $_SERVER['SERVER_ADDR'] : $config['gotty_addr'];
     $use_ssl = ($method === 'ssh') ? $config['gotty_ssh_use_ssl'] : $config['gotty_telnet_use_ssl'];
     $protocol = ((bool) $use_ssl === true) ? 'https://' : 'http://';
@@ -353,6 +361,18 @@ function quickShellSettings()
             config_update_value('gotty_telnet_enabled', $gotty_telnet_enabled);
         }
 
+        if (isset($config['gotty_addr']) === false) {
+            $config['gotty_addr'] = '';
+        }
+
+        if (isset($config['gotty_ssh_use_ssl']) === false) {
+            $config['gotty_ssh_use_ssl'] = '';
+        }
+
+        if (isset($config['gotty_telnet_use_ssl']) === false) {
+            $config['gotty_telnet_use_ssl'] = '';
+        }
+
         if ($config['gotty_addr'] != $gotty_addr) {
             config_update_value('gotty_addr', $gotty_addr);
         }
@@ -389,6 +409,25 @@ function quickShellSettings()
     $general_table->data = [];
     $general_table->style = [];
     $general_table->style[0] = 'width: 50%;';
+    if (isset($config['gotty_addr']) === false) {
+        $config['gotty_addr'] = '';
+    }
+
+    if (isset($config['gotty_ssh_enabled']) === false) {
+        $config['gotty_ssh_enabled'] = '';
+    }
+
+    if (isset($config['gotty_ssh_use_ssl']) === false) {
+        $config['gotty_ssh_use_ssl'] = '';
+    }
+
+    if (isset($disable_agentaccess) === false) {
+        $disable_agentaccess = '';
+    }
+
+    if (isset($config['gotty_telnet_use_ssl']) === false) {
+        $config['gotty_telnet_use_ssl'] = '';
+    }
 
     $general_table->data[0][] = html_print_label_input_block(
         __('Address'),
diff --git a/pandora_console/godmode/agentes/agent_manager.php b/pandora_console/godmode/agentes/agent_manager.php
index 283610e06a..fe44b479a9 100644
--- a/pandora_console/godmode/agentes/agent_manager.php
+++ b/pandora_console/godmode/agentes/agent_manager.php
@@ -246,6 +246,7 @@ if ($new_agent === true) {
 
 
 // QR Code table.
+$CodeQRContent = '';
 if ($new_agent === false) {
     $CodeQRContent .= html_print_div(['id' => 'qr_container_image'], true);
     $CodeQRContent .= html_print_anchor(
diff --git a/pandora_console/godmode/setup/setup.php b/pandora_console/godmode/setup/setup.php
index df6dcc1eb6..1db1d922e3 100644
--- a/pandora_console/godmode/setup/setup.php
+++ b/pandora_console/godmode/setup/setup.php
@@ -413,15 +413,19 @@ if (isset($config['error_config_update_config'])) {
         ui_print_success_message(__('Correct update the setup options'));
     }
 
-    if (is_array($config['error_config_update_config']['errors']) === true) {
-        foreach ($config['error_config_update_config']['errors'] as $msg) {
-            ui_print_error_message($msg);
+    if (isset($config['error_config_update_config']['errors']) === true) {
+        if (is_array($config['error_config_update_config']['errors']) === true) {
+            foreach ($config['error_config_update_config']['errors'] as $msg) {
+                ui_print_error_message($msg);
+            }
         }
     }
 
-    if (is_array($config['error_config_update_config']['warnings']) === true) {
-        foreach ($config['error_config_update_config']['warnings'] as $msg) {
-            ui_print_warning_message($msg);
+    if (isset($config['error_config_update_config']['warnings']) === true) {
+        if (is_array($config['error_config_update_config']['warnings']) === true) {
+            foreach ($config['error_config_update_config']['warnings'] as $msg) {
+                ui_print_warning_message($msg);
+            }
         }
     }
 
diff --git a/pandora_console/godmode/setup/setup_ITSM.php b/pandora_console/godmode/setup/setup_ITSM.php
index 313e6763c0..899a73a985 100644
--- a/pandora_console/godmode/setup/setup_ITSM.php
+++ b/pandora_console/godmode/setup/setup_ITSM.php
@@ -137,6 +137,10 @@ $row['hostname'] = html_print_label_input_block(
     ['div_class' => 'ITSM-remote-setup-ITSM_hostname']
 );
 
+if (isset($config['ITSM_token']) === false) {
+    $config['ITSM_token'] = '';
+}
+
 // ITSM token.
 $row['password'] = html_print_label_input_block(
     __('Token'),
diff --git a/pandora_console/godmode/setup/setup_auth.php b/pandora_console/godmode/setup/setup_auth.php
index f9f2afcd14..df4d75d6aa 100644
--- a/pandora_console/godmode/setup/setup_auth.php
+++ b/pandora_console/godmode/setup/setup_auth.php
@@ -390,7 +390,7 @@ if (is_ajax() === true) {
         set_unless_defined($config['double_auth_enabled'], false);
         $row = [];
         $row['name'] = __('Double authentication');
-        $row['control'] .= html_print_checkbox_switch(
+        $row['control'] = html_print_checkbox_switch(
             'double_auth_enabled',
             1,
             $config['double_auth_enabled'],
@@ -405,7 +405,7 @@ if (is_ajax() === true) {
         set_unless_defined($config['2FA_all_users'], false);
         $row = [];
         $row['name'] = __('Force 2FA for all users is enabled');
-        $row['control'] .= html_print_checkbox_switch(
+        $row['control'] = html_print_checkbox_switch(
             '2FA_all_users',
             1,
             $config['2FA_all_users'],
diff --git a/pandora_console/godmode/setup/setup_ehorus.php b/pandora_console/godmode/setup/setup_ehorus.php
index 6f4879a4ac..5f0d258082 100644
--- a/pandora_console/godmode/setup/setup_ehorus.php
+++ b/pandora_console/godmode/setup/setup_ehorus.php
@@ -78,6 +78,18 @@ $table_remote->class = 'databox filters filter-table-adv';
 $table_remote->size['ehorus_hostname'] = '50%';
 $table_remote->size['ehorus_port'] = '50%';
 
+if (isset($config['ehorus_user_level_conf']) === false) {
+    $config['ehorus_user_level_conf'] = '';
+}
+
+if (isset($config['ehorus_user']) === false) {
+    $config['ehorus_user'] = '';
+}
+
+if (isset($config['ehorus_pass']) === false) {
+    $config['ehorus_pass'] = '';
+}
+
 // Enable eHorus user configuration.
 $row = [];
 $row['ehorus_user_level_conf'] = html_print_label_input_block(
diff --git a/pandora_console/godmode/setup/setup_general.php b/pandora_console/godmode/setup/setup_general.php
index 3366fcc6f8..f9ea0ece51 100644
--- a/pandora_console/godmode/setup/setup_general.php
+++ b/pandora_console/godmode/setup/setup_general.php
@@ -488,6 +488,10 @@ $table->data[$i][] = html_print_label_input_block(
     )
 );
 
+if (isset($config['force_public_url']) === false) {
+    $config['force_public_url'] = '';
+}
+
 $table->data[$i++][] = html_print_label_input_block(
     __('Force use Public URL'),
     html_print_switch(
@@ -498,6 +502,10 @@ $table->data[$i++][] = html_print_label_input_block(
     )
 );
 
+if (isset($config['public_url_exclusions']) === false) {
+    $config['public_url_exclusions'] = '';
+}
+
 $table->data[$i++][] = html_print_label_input_block(
     __('Public URL host exclusions'),
     html_print_textarea(
@@ -919,6 +927,10 @@ echo '<legend>'.__('Mail configuration').'</legend>';
     $table_ncm_config->size[0] = '50%';
     $table_ncm_config->data = [];
 
+    if (isset($config['tftp_server_ip']) === false) {
+        $config['tftp_server_ip'] = '';
+    }
+
     $table_ncm_config->data[0][] = html_print_label_input_block(
         __('FTP server IP').ui_print_help_tip(__('This value will be used by TFTP_SERVER_IP macro in NCM scripts.'), true),
         html_print_input_text(
diff --git a/pandora_console/godmode/setup/welcome_tips.php b/pandora_console/godmode/setup/welcome_tips.php
index 1a62aa857b..ae669029d3 100644
--- a/pandora_console/godmode/setup/welcome_tips.php
+++ b/pandora_console/godmode/setup/welcome_tips.php
@@ -74,6 +74,8 @@ if ($view === 'create' || $view === 'edit') {
                 if (count($errors) === 0) {
                     if (count($files) > 0) {
                         $uploadImages = $tipsWindow->uploadImages($files);
+                    } else {
+                        $uploadImages = '';
                     }
 
                     $response = $tipsWindow->createTip($id_lang, $id_profile, $title, $text, $url, $enable, $uploadImages);
diff --git a/pandora_console/godmode/snmpconsole/snmp_filters.php b/pandora_console/godmode/snmpconsole/snmp_filters.php
index d4fc275122..fb8987431d 100644
--- a/pandora_console/godmode/snmpconsole/snmp_filters.php
+++ b/pandora_console/godmode/snmpconsole/snmp_filters.php
@@ -377,11 +377,15 @@ if ($edit_filter > -2) {
 
     echo '</form></div>';
 }
+
+if (isset($index) === false) {
+    $index = 0;
+}
 ?>
 
 <script type="text/javascript">
     // +1 because there is already a defined 'filter' field.
-    var id = parseInt("<?php echo $index; ?>")+1; 
+    var id = parseInt("<?php echo $index; ?>")+1;
     var homeurl = "<?php echo $config['homeurl']; ?>";
 
     $(document).ready (function () {
diff --git a/pandora_console/godmode/users/configure_user.php b/pandora_console/godmode/users/configure_user.php
index 668216d330..3754df5e12 100644
--- a/pandora_console/godmode/users/configure_user.php
+++ b/pandora_console/godmode/users/configure_user.php
@@ -1113,11 +1113,15 @@ if (!$new_user) {
 
     $user_id .= $apiTokenContent;
 
-    $CodeQRContent .= html_print_div(['id' => 'qr_container_image', 'class' => 'scale-0-8'], true);
+    $CodeQRContent = html_print_div(['id' => 'qr_container_image', 'class' => 'scale-0-8'], true);
     $CodeQRContent .= html_print_anchor(
         ['id' => 'qr_code_agent_view'],
         true
     );
+    if (isset($custom_id_div) === false) {
+        $custom_id_div = '';
+    }
+
     $CodeQRContent .= '<br/>'.$custom_id_div;
 
     // QR code div.
@@ -1581,7 +1585,12 @@ $autorefresh_list_out['operation/events/events'] = 'Events';
 
 if (isset($autorefresh_list) === false || empty($autorefresh_list) === true || empty($autorefresh_list[0]) === true) {
     $select = db_process_sql("SELECT autorefresh_white_list FROM tusuario WHERE id_user = '".$id."'");
-    $autorefresh_list = json_decode($select[0]['autorefresh_white_list']);
+    if (isset($select[0]['autorefresh_white_list']) === true) {
+        $autorefresh_list = json_decode($select[0]['autorefresh_white_list']);
+    } else {
+        $autorefresh_list = 0;
+    }
+
     if ($autorefresh_list === null || $autorefresh_list === 0) {
         $autorefresh_list = [];
         $autorefresh_list[0] = __('None');
diff --git a/pandora_console/godmode/users/user_management.php b/pandora_console/godmode/users/user_management.php
index 4fa30a253e..92fa41eb84 100644
--- a/pandora_console/godmode/users/user_management.php
+++ b/pandora_console/godmode/users/user_management.php
@@ -64,6 +64,16 @@ if ($dashboards === false) {
     }
 }
 
+$layouts = visual_map_get_user_layouts($config['id_user'], true);
+$layouts_aux = [];
+if ($layouts === false) {
+    $layouts_aux = ['None' => 'None'];
+} else {
+    foreach ($layouts as $layout) {
+        $layouts_aux[$layout] = $layout;
+    }
+}
+
 // Custom Home Screen controls.
 $customHomeScreenAddition = [];
 // Home screen. Dashboard.
@@ -81,21 +91,12 @@ $customHomeScreenAddition[HOME_SCREEN_DASHBOARD] = html_print_select(
     false,
     'width: 100%'
 );
+
 // Home screen. Visual consoles.
 $customHomeScreenAddition[HOME_SCREEN_VISUAL_CONSOLE] = html_print_select($layouts_aux, 'visual_console', $user_info['data_section'], '', '', '', true, false, true, 'w100p', false, 'width: 100%');
 // Home screen. External link and Other.
 $customHomeScreenAddition[HOME_SCREEN_EXTERNAL_LINK] = html_print_input_text('data_section', $user_info['data_section'], '', 60, 400, true);
 
-$layouts = visual_map_get_user_layouts($config['id_user'], true);
-$layouts_aux = [];
-if ($layouts === false) {
-    $layouts_aux = ['None' => 'None'];
-} else {
-    foreach ($layouts as $layout) {
-        $layouts_aux[$layout] = $layout;
-    }
-}
-
 // Home screen. Visual consoles.
 $customHomeScreenAddition[HOME_SCREEN_VISUAL_CONSOLE] = html_print_select(
     $layouts_aux,
@@ -889,7 +890,7 @@ if (users_is_admin($config['id_user']) === true || (bool) check_acl($config['id_
         true
     );
 
-    $userManagementTable->data['fields_addSettings'][1] .= html_print_div(
+    $userManagementTable->data['fields_addSettings'][1] = html_print_div(
         [
             'class'   => 'edit_user_allowed_ip '.(((int) $user_info['allowed_ip_active'] === 1) ? '' : 'invisible'),
             'content' => html_print_textarea(
@@ -914,6 +915,7 @@ if (users_is_admin($config['id_user']) === true || (bool) check_acl($config['id_
     );
 }
 
+$ITSM_host = '';
 if ($config['ITSM_enabled'] && $config['ITSM_user_level_conf']) {
     // Pandora ITSM user remote login.
     $table_ITSM = new StdClass();
diff --git a/pandora_console/include/class/TipsWindow.class.php b/pandora_console/include/class/TipsWindow.class.php
index d787e7ddea..c139e78353 100644
--- a/pandora_console/include/class/TipsWindow.class.php
+++ b/pandora_console/include/class/TipsWindow.class.php
@@ -646,7 +646,7 @@ class TipsWindow
                     ['class' => 'main_menu_icon']
                 );
                 $data[$key]['edit'] .= '</a>';
-                $data[$key]['delete'] .= '<form name="grupo" method="post" class="rowPair table_action_buttons" action="index.php?sec=gsetup&sec2=godmode/setup/setup&section=welcome_tips&action=delete">';
+                $data[$key]['delete'] = '<form name="grupo" method="post" class="rowPair table_action_buttons" action="index.php?sec=gsetup&sec2=godmode/setup/setup&section=welcome_tips&action=delete">';
                 $data[$key]['delete'] .= html_print_input_image(
                     'button_delete_tip',
                     'images/delete.svg',
@@ -1087,7 +1087,7 @@ class TipsWindow
             return false;
         }
 
-        if ($images !== null) {
+        if ($images !== '') {
             foreach ($images as $key => $image) {
                 $res = db_process_sql_insert(
                     'twelcome_tip_file',
diff --git a/pandora_console/include/functions_filemanager.php b/pandora_console/include/functions_filemanager.php
index a390ee2c1a..fa5b3f2eab 100644
--- a/pandora_console/include/functions_filemanager.php
+++ b/pandora_console/include/functions_filemanager.php
@@ -1065,8 +1065,10 @@ function filemanager_file_explorer(
             $modal_real_path = "<div><b>Real path to plugin execution is:</b></div>
                                 <div id='real_path'></div>";
 
-            if (isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] == 'on' || $_SERVER['SERVER_NAME'] == 'localhost' || $_SERVER['SERVER_NAME'] == '127.0.0.1') {
-                $modal_real_path .= "<div style='float:right;margin: 5em 0 0 auto';>".html_print_submit_button(__('Copy'), 'submit', false, ['icon' => 'wand', 'mode' => 'mini'], true).'</div>';
+            if (isset($_SERVER['HTTPS']) === true) {
+                if ($_SERVER['HTTPS'] == 'on' || $_SERVER['SERVER_NAME'] == 'localhost' || $_SERVER['SERVER_NAME'] == '127.0.0.1') {
+                    $modal_real_path .= "<div style='float:right;margin: 5em 0 0 auto';>".html_print_submit_button(__('Copy'), 'submit', false, ['icon' => 'wand', 'mode' => 'mini'], true).'</div>';
+                }
             }
 
             html_print_div(
diff --git a/pandora_console/include/lib/ITSM/ITSM.php b/pandora_console/include/lib/ITSM/ITSM.php
index 4879ac9f39..14792e99ee 100644
--- a/pandora_console/include/lib/ITSM/ITSM.php
+++ b/pandora_console/include/lib/ITSM/ITSM.php
@@ -43,6 +43,9 @@ class ITSM
 
         $this->userLevelConf = (bool) $config['ITSM_user_level_conf'];
         $this->url = ($host ?? $config['ITSM_hostname']);
+        if (isset($config['ITSM_token']) === false) {
+            $config['ITSM_token'] = '';
+        }
 
         $this->userBearer = ($token ?? $config['ITSM_token']);
         if ($this->userLevelConf === true) {
diff --git a/pandora_console/include/lib/TacticalView/elements/Database.php b/pandora_console/include/lib/TacticalView/elements/Database.php
index 4c0d3a5368..c329f062bf 100644
--- a/pandora_console/include/lib/TacticalView/elements/Database.php
+++ b/pandora_console/include/lib/TacticalView/elements/Database.php
@@ -197,6 +197,10 @@ class Database extends Element
         $string_reads = [];
         $total = 0;
         foreach ($reads as $key => $read) {
+            if (isset($read['utimestamp']) === false) {
+                $read['utimestamp'] = '';
+            }
+
             $dates[] = date('d-m-Y H:i:s', $read['utimestamp']);
             $string_reads[] = $read['datos'];
             $total += $read['datos'];
@@ -272,6 +276,10 @@ class Database extends Element
         $string_writes = [];
         $total = 0;
         foreach ($writes as $key => $write) {
+            if (isset($write['utimestamp']) === false) {
+                $write['utimestamp'] = '';
+            }
+
             $dates[] = date('d-m-Y H:i:s', $write['utimestamp']);
             $string_writes[] = $write['datos'];
             $total += $write['datos'];
diff --git a/pandora_console/index.php b/pandora_console/index.php
index 244778a75b..1a70cbcd48 100755
--- a/pandora_console/index.php
+++ b/pandora_console/index.php
@@ -1570,6 +1570,10 @@ echo '</html>';
 $run_time = format_numeric((microtime(true) - $config['start_time']), 3);
 echo "\n<!-- Page generated in ".$run_time." seconds -->\n";
 
+if (isset($_GET['logged']) === false) {
+    $_GET['logged'] = '';
+}
+
 // Values from PHP to be recovered from JAVASCRIPT.
 require 'include/php_to_js_values.php';
 ?>
diff --git a/pandora_console/views/dashboard/tipsWindow.php b/pandora_console/views/dashboard/tipsWindow.php
index 3d5b284f3f..1f56d545e9 100644
--- a/pandora_console/views/dashboard/tipsWindow.php
+++ b/pandora_console/views/dashboard/tipsWindow.php
@@ -30,6 +30,10 @@ if (isset($preview) === false) {
     $preview = '';
 }
 
+if (isset($id) === false) {
+    $id = '';
+}
+
 $output = '';
 $output .= '<script>var idTips = ['.$id.'];</script>';
 $output .= '<div class="window">';
@@ -63,8 +67,10 @@ if ($files !== false) {
 }
 
 if (isset($files64) === true) {
-    foreach ($files64 as $key => $file) {
-        $output .= '<img src="'.$file.'" />';
+    if ($files64 !== false) {
+        foreach ($files64 as $key => $file) {
+            $output .= '<img src="'.$file.'" />';
+        }
     }
 }