common.regex

email --- ^[\_]*([a-z0-9]+(\.|\_*)?)+@([a-z][a-z0-9\-]+(\.|\-*\.))+[a-z]{2,6}$

domain --- ^([a-z][a-z0-9\-]+(\.|\-*\.))+[a-z]{2,6}$

Year 1900-2099 --- ^(19|20)[\d]{2,2}$

Date (dd mm yyyy, d/m/yyyy, etc.) --- ^([1-9]|0[1-9]|[12][0-9]|3[01])\D([1-9]|0[1-9]|1[012])\D(19[0-9][0-9]|20[0-9][0-9])$

IP v4 --- ^(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]){3}$