From 076acc2035c0ee05aa90c61d90485ad3c58f4ffc Mon Sep 17 00:00:00 2001
From: plegall <plg@piwigo.org>
Date: Fri, 9 Sep 2022 12:42:11 +0200
Subject: [PATCH] fixes #1709 incorrect pattern to delete custom sizes

---
 admin/include/functions.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/admin/include/functions.php b/admin/include/functions.php
index d234449dc0..38bbdc5732 100644
--- a/admin/include/functions.php
+++ b/admin/include/functions.php
@@ -2951,7 +2951,7 @@ function clear_derivative_cache($types='all')
     $type = $types[$i];
     if ($type == IMG_CUSTOM)
     {
-      $type = derivative_to_url($type).'[a-zA-Z0-9]+';
+      $type = derivative_to_url($type).'_[a-zA-Z0-9]+';
     }
     elseif (in_array($type, ImageStdParams::get_all_types()))
     {