如何删除/取消设置 php 上的 cookie？
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How to delete/unset a cookie on php?
提问by Someone
I want to unset/delete my existing cookie with this:
我想取消设置/删除我现有的 cookie：
setcookie ("user", "", time()-1);
unset($user);
But cookies can not be deleted or unset. So what is problem?
但是 cookie 不能被删除或取消设置。那么什么是问题呢？
回答by Sonal Khunt
you can unset cookies this way only may -1 not work
您只能以这种方式取消设置 cookie 可能 -1 不起作用
try this
尝试这个
setcookie ("user", "", time() - 3600);
回答by Tom van der Woerdt
Nothing - that code looks fine to me.
什么都没有 - 该代码对我来说看起来不错。
Quoting the docs:
引用文档：
When deleting a cookie you should assure that the expiration date is in the past, to trigger the removal mechanism in your browser.
删除 cookie 时，您应确保过期日期已过去，以触发浏览器中的删除机制。
setcookie ("TestCookie", "", time() - 3600);
You may like to specify a time that's more in the past to avoid problems with the computer's time that may be a bit off.
您可能希望指定一个更早的时间，以避免计算机时间可能有点偏差。
Additionally, in some cases it's useful to actually unset $_COOKIE['TestCookie']as well.
此外，在某些情况下，实际取消设置$_COOKIE['TestCookie']也很有用。
回答by emavens
When deleting a cookie you should assure that the expiration date is in the past.
删除 cookie 时，您应确保过期日期已过去。
Delete example:
删除示例：
// set the expiration date to one hour ago
setcookie("user", "", time()-3600);
回答by Vovkin
As already was said - when deleting a cookie you should assure that the expiration date is in the past.
如前所述 - 在删除 cookie 时，您应该确保过期日期是过去的。
BUT you also have to use the same path and even domainfor deleting, which you used for cookie creating, so if create cookie like this
但是您还必须使用相同的路径甚至域来删除，您用于创建 cookie，所以如果像这样创建 cookie
setcookie ("user", "John", time()+7200, '/', 'mydomain.com');
to delete this cookie use this code
删除此cookie使用此代码
setcookie ("user", "", time()-3600, '/', 'mydomain.com');
and also better use specific date in the past instead of time() - 3600
并且最好使用过去的特定日期而不是time() - 3600
回答by Dileep Kheni
// MUST provide root path or any particular cookie path
//必须提供根路径或任何特定的 cookie 路径
//SET COOKIE
setcookie ("user", "", time() + 3600 , '/');
//UNSET COOKIE
setcookie ("user", "", time()-100 , '/' ); // past time
回答by user4990100
setcookie ("user", "", time() - 3600);
//will reset cookie(client,browser)
unset($_COOKIE["user"]);
// will destroy cookie(server)
