Fixed incorrect detection of numerics

diff --git a/wcfsetup/install/files/lib/system/importer/PageImporter.class.php b/wcfsetup/install/files/lib/system/importer/PageImporter.class.php
index d53e442e2667cd67cc7e2ad2902a2ea43b53bde0..74ffe89c389209d7d0148373d38319e0051ee8eb 100644 (file)
--- a/wcfsetup/install/files/lib/system/importer/PageImporter.class.php
+++ b/wcfsetup/install/files/lib/system/importer/PageImporter.class.php
@@ -57,7 +57,7 @@ class PageImporter extends AbstractImporter {
                }
                
                // check old id
-               if (is_numeric($oldID)) {
+               if (ctype_digit((string)$oldID)) {
                        $page = new Page($oldID);
                        if (!$page->pageID) $data['pageID'] = $oldID;
                }