diff --git a/src/Utils/Strings.php b/src/Utils/Strings.php
index 378ceee63..2a649ea7e 100644
--- a/src/Utils/Strings.php
+++ b/src/Utils/Strings.php
@@ -397,9 +397,11 @@ public static function findPrefix(array $strings): string
 	 */
 	public static function length(string $s): int
 	{
-		return function_exists('mb_strlen')
-			? mb_strlen($s, 'UTF-8')
-			: strlen(utf8_decode($s));
+		return match (true) {
+			extension_loaded('mbstring') => mb_strlen($s, 'UTF-8'),
+			extension_loaded('iconv') => iconv_strlen($s, 'UTF-8'),
+			default => strlen(@utf8_decode($s)), // deprecated
+		};
 	}