How to set the cookie validity period in php to close the browser process?

How to set the cookie validity period in php to close the browser process: first use the setCookie method to set hours to an empty string; then set hours to empty in the same way in php; and finally set hours to 0.

#php method to set the cookie validity period to close the browser process:

Use the setCookie method and set hours to empty String, the cookie's lifetime will end after the browser session

function setCookie(name,value,hours,path){}

I also want to set it in PHP like this

setCookie("lastime",$selectlogin['lastime'],0,'/');

Set hours to be empty, but an error was reported, and then I set hours to 0. This cookie is valid for as long as the browser process.

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