first commit

pma/libraries/classes/Controllers/Export/CheckTimeOutController.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PhpMyAdmin\Controllers\Export;
+
+use PhpMyAdmin\Controllers\AbstractController;
+
+final class CheckTimeOutController extends AbstractController
+{
+    public function __invoke(): void
+    {
+        $this->response->setAjax(true);
+
+        if (isset($_SESSION['pma_export_error'])) {
+            unset($_SESSION['pma_export_error']);
+            $this->response->addJSON('message', 'timeout');
+
+            return;
+        }
+
+        $this->response->addJSON('message', 'success');
+    }
+}