fix: corrected fatal errors

Author: thorsten

phpmyfaq/faq.php

@@ -171,6 +171,7 @@
 }
 
 // List all faq attachments
+$attachmentList = [];
 if ($faqConfig->get('records.disableAttachments') && 'yes' == $faq->faqRecord['active']) {
     try {
         $attList = AttachmentFactory::fetchByRecordId($faqConfig, $faqId);

phpmyfaq/src/phpMyFAQ/Category/Order.php

@@ -124,16 +124,11 @@ public function setCategoryTree(
     public function getCategoryTree(array $categories, int $parentId = 0): array
     {
         $result = [];
-        $stack = [[$parentId, &$result]];
 
-        while (!empty($stack)) {
-            list($currentParentId, &$currentResult) = array_pop($stack);
-
-            foreach ($categories as $category) {
-                if ((int) $category['parent_id'] === $currentParentId) {
-                    $currentResult[$category['category_id']] = [];
-                    $stack[] = [$category['category_id'], &$currentResult[$category['category_id']]];
-                }
+        foreach ($categories as $category) {
+            if ((int)$category['parent_id'] === $parentId) {
+                $childCategories = $this->getCategoryTree($categories, (int)$category['category_id']);
+                $result[$category['category_id']] = $childCategories;
             }
         }