How does the record password function of the website be implemented?

Is it done by saving the user name and password in a cookie? If so, this should be very unsafe, right?
or by other means?

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Is it done by saving the user name and password in a cookie? If so, this should be very unsafe, right?
or by other means?

is to record a cookie and set his expiration date.

For example, if you want to save a day, you set it to 24*3600 seconds, and so on

cookieRealize

Record two cookies, one for the username, and one for the encrypted string of the user name, password, and salt.

Server-side: Query the database for a salt and password using the user name obtained from the first cookie, and then compare it to the second cookie.

Maybe that's it, how I did it.

How to do a safe "remember Me" feature

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