Commands history

[dstonek]

I was suggested to have updated software to avoid intruders and I am going backwards with php.
I suppose that new versions not necessarily mean better security, it would be new holes.
My present server is a Fedora8 php5.2.6
From 2003 I never have had intruders like this year.
So I am building a new server in my hosting co.: Centos 5.3
The problem is that the last php version in its repositories is 5.1.6
I've read about third-party repositories for newer php versions, and I also have read about lot of problems with them.
It seems like 5.1.6 php version is safer than the newer ones for Centos.
I am worrying about some commands I could be using in 5.2.6 that doesn't exist in 5.1.6
Where can I find a list of functions that have been added after 5.1.6?
Thank you in advance

Sorry, I was confused about the word "command" and "function"
Here it is.
http://www.php.net/manual/en/migration52.functions.php

[NogDog]

While there is always the possibility of security holes within actual PHP functions, the vast majority of security holes are in the way they are used by the programmer. As such, I would strongly suggest that you get a copy of Essential PHP Security by Chris Shifflet.