2021-06-15 2021/6/15bugkuweb30<?phpextract($_GET);if (!empty($ac)){$f = trim(file_get_contents($fn));if ($ac === $f){echo "<p>This is flag:" ." $flag</p>";}else{echo "<p>sorry!</p& ctf 2023-10-12 169 点赞 2 评论 256 浏览