diff --git a/public/admin/ping.php b/public/admin/ping.php
new file mode 100644
index 0000000..b2f2ac7
--- /dev/null
+++ b/public/admin/ping.php
@@ -0,0 +1,6 @@
+<?php
+declare(strict_types=1);
+
+header('Content-Type: text/plain; charset=utf-8');
+echo "admin ping ok\n";
+echo 'Time: ' . date('c') . "\n";