aa=&bb=0108135719&cc=20180108135935&dd=ee&ff=201801081358544265&gg=1&hh=1000&ii=&
i have a string like this and i trying to get specific value from it, it is in text format. what can i do if i want to get value of 'aa' it null and value of 'bb' it is 0108135719 tats it. I'm tried different regex but unable to get the desired output.