How to clear cookies in php

How to clear cookies in php: First create a cookie through setcookie; then use the "setcookie('test',time() - 3600);" method to clear the created cookie.

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PHP Clear COOKIE? PHP cannot delete COOKIE? Set the COOKIE validity period

PHP transparently supports HTTP cookies. Cookies are a mechanism that stores data on the remote browser side and uses it to track and identify users. You can use the

setcookie() or setrawcookie() function to set cookies. Cookies are part of the HTTP header, so the setcookie() function must be called before

other information is output to the browser. , which is similar to the restriction on the header() function.

setcookie();

The way to delete a cookie is to set the validity period of this cookie to before the current time.

setcookie('test', 'true', time() + 300); // 创建 cookie
//setcookie('test',time() - 3600 );  // 清除建立的 cookie
//setcookie('test'); //只是将 $_COOKIE['test'] 的值清空
如果直接setcookie('test', '');
echo '
';
print_r($_COOKIE); //attay();

You will find that the $_COOKIE array is empty, not just $_COOKIE['test'] is empty , so winsock captured the packet and observed the returned

http header. It turned out to be: set-cookie:test=deleted; expires=Mon, 29-May-2014 10:22:15 GMT

Login:

setcookie('username', 'zhangsan', time()+1000, "/php100");

Exit:

setcookie('username', '', time()-3600);

I found that there is no problem under IE when exiting, but when tested in Firefox, the login is normal and cannot exit. Check IE and Firefox After testing, I found out that the fourth parameter (legal path parameter) of setcookie() was not specified, so the cookie path set when logging in and exiting was different (Firefox is more strict, As a result, various variables were rebuilt)

It was found that there was no problem under IE when exiting, but when tested in Firefox, the login was normal and unable to exit. Check the difference in cookie records in IE and Firefox, and after testing

I discovered that the fourth parameter (legal path parameter) of setcookie() was not specified, so the path of the cookie set when logging in and exiting was different (Firefox is stricter, resulting in the reconstruction of each variable)

Example:

$value = 'something';
setcookie('TestCookie', $value, time() + 3600);
setcookie('mytest', $value, time() + 3600, "~rasmus", ".maoge.com", 1);
if (isset($_COOKIE['TestCookie']))
{
echo 'TestCookie :' . $_COOKIE['TestCookie'];
}

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