--- fenglin/bbs/article_service_post.php	2025/04/25 07:12:12	1.3
+++ fenglin/bbs/article_service_post.php	2025/04/27 02:35:47	1.4
@@ -496,7 +496,7 @@
 				exit(json_encode($result_set));
 			}
 
-			$ext = strtolower(substr($filename, (strrpos($filename, ".") ? strrpos($filename, ".") + 1 : 0)));
+			$ext = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
 			switch ($ext)
 			{
 				case "bmp":