check out my shitty text board implementation

in 75 lines of php

[url=http://54.245.123.189/190chan/]http://54.245.123.189/190chan/[/url]

it has no sql or html injection protection

SOURCE
[url=http://54.245.123.189/190chan/index.phps]
http://54.245.123.189/190chan/index.phps
[/url]

HOSTED THANKS TO AMAZON E CEE TWO

It's not "75 lines of php", you need to count the stuff in common.php (and all it includes) and the functions that are called here but not defined anywhere else.

And learn about something called "escaping", it should be the first thing in your mind when producing output and consuming input, and will automatically make your code resistant to lots of different injection attacks.