From 2f606b92edf5ca4d0fff1e99353c360aa8b2d1bc Mon Sep 17 00:00:00 2001
From: kyrena <78410399+kyrena@users.noreply.github.com>
Date: Wed, 7 Jun 2023 09:49:25 +0200
Subject: [PATCH] Fixed passing null is deprecated for explode in
 Mage_Catalog_Model_Resource_Product_Indexer_Eav_Source (#3297)

---
 .../Mage/Catalog/Model/Resource/Product/Indexer/Eav/Source.php  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/code/core/Mage/Catalog/Model/Resource/Product/Indexer/Eav/Source.php b/app/code/core/Mage/Catalog/Model/Resource/Product/Indexer/Eav/Source.php
index 7e647806129..e3c8175a4f8 100644
--- a/app/code/core/Mage/Catalog/Model/Resource/Product/Indexer/Eav/Source.php
+++ b/app/code/core/Mage/Catalog/Model/Resource/Product/Indexer/Eav/Source.php
@@ -228,7 +228,7 @@ protected function _prepareMultiselectIndex($entityIds = null, $attributeId = nu
         $data  = [];
         $query = $select->query();
         while ($row = $query->fetch()) {
-            $values = array_unique(explode(',', $row['value']));
+            $values = empty($row['value']) ? [] : array_unique(explode(',', $row['value']));
             foreach ($values as $valueId) {
                 if (isset($options[$row['attribute_id']][$valueId])) {
                     $data[] = [