N°4517 - PHP 8.1: Fix deprecated notice for null value passed to string parameter of native PHP functions

core/inlineimage.class.inc.php

@@ -242,7 +242,7 @@ class InlineImage extends DBObject
 	public static function OnFormCancel($sTempId): bool
 	{
 		// Protection against unfortunate massive delete of inline images when a null temp ID is passed
-		if (strlen($sTempId) === 0) {
+		if (utils::IsNullOrEmptyString($sTempId)) {
 			IssueLog::Trace('OnFormCancel "error" $sTempId is null or empty', LogChannels::INLINE_IMAGE, array(
 				'$sTempId' => $sTempId,
 				'$sUser' => UserRights::GetUser(),