> For the complete documentation index, see [llms.txt](https://oklencodes.gitbook.io/untitled/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://oklencodes.gitbook.io/untitled/ctfs/biteme-ctf/looking-into-the-php-code-and-decoding-hexadecimal.md).

# Looking into the PHP code and decoding hexadecimal

If I now check **console/index.phps** I can see PHP code and how it is working in regards to users, passwords, cookies and mfa

![
](/files/gCy4kGUchBZspiuxgF7N)

I can also look at **console/functions.phps** While looking through this I see that there is a config.php, im going to add the (s). Under function I can see the user is described in hexadecimal (bin2hex) but below that when returning $user there was no function or definition for LOGIN\_USER. So i decided to check out the php page

![](/files/1CT4BO5MwtKxl0HbQTHx)

"@fred lets talk about ways to make this more secure but still flexible"

below that is a function – The function is saying if the hash of the password inputted is valid, return the substring of the hash with the last 3 digits equal to '001'

![](/files/5h8nno45WNdfnjugl7aw)

In config.phps page – Login user is clearly defined in hexadecimal. Initially I was going to save it somewhere but I can actually decode it in my terminal with echo (hexadecimal)

```bash
echo (hexadecimal) | xxd -r -p"
```

*xxd* creates a hex dump of a given file or standard input. It can also convert a hex dump back to its original binary form.

-r reverses it and -p prints it out.

![](/files/WDsVfsEJ3RggtKpWQSKp)


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