How to delete cookies correctly in php

The correct way to delete cookies in php is to change the expiration date to a point in time in the past, such as [setcookie("username",$username,time() 60*60*2);setcookie("username ","");].

Set cookies:

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setcookie("username",$username,time()+60*60*2);

The time of this cookie is the current time, which is the time when the cookie was first set (time() 60 seconds 60 seconds 2) plus 2 hours. The cookie will be cleared after 2 hours, otherwise, it will be cleared after closing the browser.

Deleting cookies:

When deleting a cookie, you should change the expiration date to a point in time in the past.

setcookie("username","");

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