diff --git a/index.php b/index.php
new file mode 100644
index 0000000..13a3c60
--- /dev/null
+++ b/index.php
@@ -0,0 +1,6 @@
+<?php
+$img_array = glob('images/*.{gif,jpg,png,jpeg,webp,bmp}', GLOB_BRACE);
+if(count($img_array) == 0) die('没找到图片文件。请先上传一些图片到 '.dirname(__FILE__).'/images/ 文件夹');
+header('Content-Type: image/png');
+echo(file_get_contents($img_array[array_rand($img_array)]));
+?>
\ No newline at end of file