How to make php cookie invalid after closing the browser

php How to set the cookie to become invalid after closing the browser: first open the corresponding code file; then use the "setcookie("stat",time());" statement to achieve the invalidation after closing the browser.

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"I have been writing a program recently and have been thinking about how to use PHP The cookie will expire when the browser is closed or after 24 hours?"

For PHP, it is very simple to set the cookie to expire when the browser is closed, as long as the date is not written, for example:

setcookie("mark",1);

Many people think that if you write it like this, it will definitely become invalid after 24 hours. Who wouldn’t sleep for 24 hours? Yes, it is normal to sleep within 24 hours, but there are many people who do not turn off their phones within 24 hours.

How to make it invalid after 24 hours? After thinking about it, I can only consider it in terms of time.

Suddenly thought of the following writing method:

setcookie("stat",date("d"));  //date()函数里面的$timestamp 是可以不写的，不写的时候，默认本地当前时间

This seems to be OK, but for night owls in the middle of the night, it is troublesome. I accessed the program at 23:59 and restarted one minute later. Recorded, this is unreasonable.

In the end we can only consider using the time interval to calculate

setcookie("stat",time());

You need to judge whether the time interval reaches 24 hours when you re-record next time.

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