How to Effectively Remove Cookies in PHP?

Removing Cookies Effectively in PHP

When attempting to remove a cookie using the unset($_COOKIE['hello']) function, you may notice that the cookie persists in your browser's cookie inspector. To truly eliminate the cookie, a more comprehensive approach is required.

Solution:

For thorough cookie removal, utilize the following code:

if (isset($_COOKIE['remember_user'])) {
    unset($_COOKIE['remember_user']);
    setcookie('remember_user', '', -1, '/');
    return true;
} else {
    return false;
}

In this solution:

1. Check if the Cookie Exists: Start by verifying if the cookie you want to remove is set using isset($_COOKIE['remember_user']).
2. Unset the Cookie Variable: Use unset($_COOKIE['remember_user']) to remove the cookie's value from the PHP variable.
3. Set a New Expired Cookie: Call setcookie('remember_user', '', -1, '/') to create a new cookie with the same name as the one you want to remove. However, set its expiry to a past date (-1) to effectively delete it.
4. Return a Success Flag: The function returns true if the cookie was successfully removed, or false if it was not set in the first place.

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