The difference between cokkie and session

cookie Limited length , Maximum 4kb

cookie Save on client （ browser ）,session Save on the server side .

session Can store any data type , In general, we can session Keep some common variable information in , for instance UserId etc. .

cookie Can be set to hold for a long time , For example, we often use the default login function ,session Short general failure time , Client shutdown or session Timeout will fail .

session More secure ：

sessionID There is cookie in , To break through session First of all, break through cookie

sessionID You want the user to log in or open session Only then , All breakthroughs cookie Not necessarily session

session Turn it on again , The first one expired

also sessionID It's encrypted.