What potential issues can arise when attempting to delete cookies in PHP, as seen in the provided code snippet?

When attempting to delete cookies in PHP, a potential issue that can arise is setting a past expiration time for the cookie. This can result in the cookie not being deleted as expected. To solve this issue, you should set the expiration time of the cookie to a past time, such as time() - 3600, to ensure it is immediately expired and deleted. 

// Delete a cookie by setting its expiration time to a past time
if (isset($_COOKIE['cookie_name'])) {
    unset($_COOKIE['cookie_name']);
    setcookie('cookie_name', '', time() - 3600, '/');
}

Keywords

cookies deletion PHP unset expiration

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