From d46c76d6768e076f7136e6e5fe079ca6fdaeea3c Mon Sep 17 00:00:00 2001
From: Fabian Schieder <fabian.schieder.1010@gmail.com>
Date: Wed, 18 Mar 2026 16:06:45 +0100
Subject: [PATCH] fix: improve search term length validation to support
 multibyte characters

---
 compcards.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/compcards.php b/compcards.php
index c79f293..c3b1b4e 100644
--- a/compcards.php
+++ b/compcards.php
@@ -18,7 +18,8 @@ $conn = db_connect();
 // (statt der Kategorie-Sektionen).
 // ─────────────────────────────────────────────
 $searchTerm = isset($_GET['search']) ? trim((string)$_GET['search']) : '';
-if ($searchTerm !== '' && mb_strlen($searchTerm, 'UTF-8') >= 2) {
+$searchLen = function_exists('mb_strlen') ? mb_strlen($searchTerm, 'UTF-8') : strlen($searchTerm);
+if ($searchTerm !== '' && $searchLen >= 2) {
     $like = addcslashes($searchTerm, "%_\\");
     $like = '%' . $like . '%';