From dc51d5b0362b9acad749f55316bff0968e41f9f4 Mon Sep 17 00:00:00 2001
From: Riccardo Bessone <riccardo@bess.one>
Date: Thu, 28 Nov 2024 18:01:37 +0100
Subject: [PATCH] Fix deprecated strlen on null

---
 src/ColumnSortable/SortableLink.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ColumnSortable/SortableLink.php b/src/ColumnSortable/SortableLink.php
index 986b0f2..8499acb 100644
--- a/src/ColumnSortable/SortableLink.php
+++ b/src/ColumnSortable/SortableLink.php
@@ -248,7 +248,7 @@ private static function shouldShowActive($sortColumn)
     private static function buildQueryString($queryParameters, $sortParameter, $direction)
     {
         $checkStrlenOrArray = function ($element) {
-            return is_array($element) ? $element : strlen($element);
+            return is_array($element) ? $element : strlen($element ?? '');
         };
 
         $persistParameters = array_filter(request()->except('sort', 'direction', 'page'), $checkStrlenOrArray);