Rating:
# blind
The challange was:

When you open the link it shows the php code of the page.
```php
__construct('/flag', '0', 'TRUE', '') #1 {main} thrown in **/var/www/html/index.php** on line **43**
```
Flag is `35c3_even_a_blind_squirrel_finds_a_nut_now_and_then`