Offensive and defensive web novice section

First look at the topic to view the source code to enter the topic scene

Press F12 to view the source code of the webpage and find the string of code under the flag to copy

First look at the topic and enter the topic scene to view the robots agreement

Enter /robots.txt to view and copy f1ag_1s_h3re.php to view flag

Copy this code is the answer

First look at the title, find the backup file, and enter the title scene

When you see this page, enter the /index.php.bak file and open it after the download is complete

See this interface to find the answer

See the topic clearly and enter the scene

See this and press F12 to view the source code

See cookiephp input/cookie.php view

You can see the answer