> For the complete documentation index, see [llms.txt](https://the-winrars.gitbook.io/writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://the-winrars.gitbook.io/writeups/2020-writeups/nahamconctf/web/phpphonebook.md).

# PHPPhoneBook

This challenge uses a LFI vulnerability

Use base64 filter to read phonebook.php If

```php
 $_POST($emergency)
```

is set we get flag so POST and

## flag = {phon3\_numb3r\_3xtr4ct3d}