Remove a cookie

Question

When I want to remove a Cookie I try

unset($_COOKIE[\'hello\']);

I see in my cookie browser from firefox that the cookie still exists. How

Answer 1

Just set the expiration date to one hour ago, if you want to "remove" the cookie, like this:

setcookie ("TestCookie", "", time() - 3600);

or

setcookie ("TestCookie", "", time() - 3600, "/~rasmus/", "example.com", 1);

Source: http://www.php.net/manual/en/function.setcookie.php

You should use the filter_input() function for all globals which a visitor can enter/manipulate, like this:

$visitors_ip = filter_input(INPUT_COOKIE, 'id');

You can read more about it here: http://www.php.net/manual/en/function.filter-input.php and here: http://www.w3schools.com/php/func_filter_input.asp