[snakes1100]

If your actually being DDoS'd and its already in progress, 99% of the time you won't even be able to access your server, you will need to speak to your host, your not going to stop a DDoS attack with anything via the server/forums, the attack needs to be stopped at the router level if the server is already over whelmed with the mass request attack.

As well as some posts here say, your hacks arent whats being attacked via DDoS, DDoS attacks happen at the NIC level and is targeting things such as echo/ping requests and flooding the server with to many requests. An attack on a poorly written PHP page isn't really considered a DDoS attack.