fix bugs in php 8.1 changes (#6744)

* Update voicemail_greetings.php

* Update recordings.php

* Update recording_edit.php

* Update phrases.php

* Update phrase_edit.php

* Update music_on_hold_edit.php

* Update fax_queue.php

* Update extensions.php

* Update email_templates.php

* Update email_queue_edit.php

* Update dialplan_inbound_add.php

* Update device_profiles.php

* Update device_profile_copy.php

* Update contact_address_edit.php

* Update call_recordings.php

* Update call_center_agent_edit.php

* Update call_center_agents.php

* Update call_center_queues.php

* Update call_block.php

* Update menu_edit.php

* Update default_setting_edit.php

* Update database_edit.php

core/databases/database_edit.php

@@ -132,7 +132,7 @@ if (count($_POST)>0 && empty($_POST["persistformvar"])) {
 		}
 
 	//add or update the database
-	if ($_POST["persistformvar"] != "true") {
+	if (empty($_POST["persistformvar"])) {
 
 		//begin array
 			$array['databases'][0]['database_driver'] = $database_driver;

core/default_settings/default_setting_edit.php

@@ -17,7 +17,7 @@
 
  The Initial Developer of the Original Code is
  Mark J Crane <[email protected]>
- Portions created by the Initial Developer are Copyright (C) 2008-2022
+ Portions created by the Initial Developer are Copyright (C) 2008-2023
  the Initial Developer. All Rights Reserved.
 
  Contributor(s):
@@ -136,7 +136,7 @@
 			}
 
 		//add or update the database
-			if ($_POST["persistformvar"] != "true") {
+			if (empty($_POST["persistformvar"])) {
 				// fix null
 				$default_setting_order = ($default_setting_order != '') ? $default_setting_order : 'null';
 

core/menu/menu_edit.php

@@ -92,7 +92,7 @@
 			}
 
 		//add or update the database
-		if ($_POST["persistformvar"] != "true") {
+		if (empty($_POST["persistformvar"])) {
 			if ($action == "add") {
 				//create a new unique id
 					$menu_uuid = uuid();