"\n" -> new line
"\t" -> tab
"\r" -> carriage return
but i wont a better explain
pritaes is well respected, and has taken time to help you. You clearly have not checked google, nor the search function on this web site.
All of what you are "wanting a better explaination" on is very easily searched via google. You seem to lack a basic understanding of "DO NOT BIT THE HAND THAT FEEDS".
I have watched the last few threads of yours and it appears you have ripped someone elses code and quite clearly do not know how it functions. Have you actually thought of contacting the individual that created it the first time round?