PHP setting cookie time to past wont delete it - php

Question

I have a problem with unsetting cookies. At the moment, i am unable to log out. Cookies itself works like a charm while validating user session.
So upon first login i am setting cookies in this way (on successful login):
$cookie_username = $username;
$cookie_password = sha1(md5($password));
$cookie_value = 'username='.$cookie_username.'&hash='.$cookie_password;
$cookie_name = 'remember_me#website';
$cookie_time = time() + 31536000;
setcookie($cookie_name, $cookie_value, $cookie_time, '/', '.website.com');
Cookies above work well and i dont have problems with reading them.
This is my logout code:
setcookie($cookie_name, '', time()-3600, '/', '.website.com');
unset($_COOKIE[$cookie_name]);
unset($_SESSION['username']); \
unset($_SESSION['loggedin']); / were setted after successful login
According to what i have read around SO this should work and delete cookies, however they dont :(

Answer 1

You have to be sure the cookie's name, domain, path, and even security settings are all identical to what you're attempting to delete.
If you created the cookie like this:
setcookie('name', 'value', time()+3600);
and then attempted to delete it like this:
setcookie('name', 'value', time()-3600, '/', '.website.com');
That won't work. You have to have the exact same parameters that were used when creating the cookie.
If you created the cookie in JavaScript, double-check your settings there.
As a test, try all of the following code. If it works, comment out each one-by-one, until you're only left with the one that worked:
setcookie($cookie_name, '', time()-3600);
setcookie($cookie_name, '', time()-3600, '/');
setcookie($cookie_name, '', time()-3600, '/', '.website.com');
setcookie($cookie_name, '', time()-3600, '/', '.website.com', 1);