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

app/recordings/recordings.php

@@ -268,7 +268,7 @@
 	}
 
 //process the http post data by action
-	if ($action ?? '' && is_array($recordings)) {
+	if (!empty($action) && is_array($recordings)) {
 		switch ($action) {
 			case 'delete':
 				if (permission_exists('recording_delete')) {