A hash function is any well-defined procedure or mathematical function that converts a large amount of data into a small datum, usually a single integer. For questions about the Twitter and Facebook # symbol, use hashtag
Whirlpool is a cryptographic hash function designed by Rijmen and Barreto.
"If you want longer hash lets call more secure you should use something like sha512 whirlpool etc"
from question "PHP MD5(MD5) hashing"