Check parameter type before processing

Fixes #12443

Signed-off-by: Michal Čihař <michal@cihar.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/db_export.php b/db_export.php
index abd4b4c3d7..2ff84170d2 100644
--- a/db_export.php
+++ b/db_export.php
@@ -109,7 +109,7 @@ foreach ($tables as $each_table) {
     } else {
         $structure_checked = $is_checked;
     }
-    if (isset($_GET['table_data'])) {
+    if (isset($_GET['table_data']) && is_array($_GET['table_data'])) {
         $data_checked = PMA_getCheckedClause(
             $each_table['Name'], $_GET['table_data']
         );