Why Doesn\'t `setcookie(\"user\", false);` Delete All Website Cookies in PHP?

How to Delete All Website Cookies in PHP

You've encountered an issue where the setcookie("user", false); function is not effectively deleting all website cookies. This article explores the solution to this problem, providing a PHP snippet that addresses this specific requirement.

Solution: PHP's setcookie() Function

To unset all cookies for your domain using PHP, refer to the PHP documentation on setcookie(). The following code effectively achieves this:

<code class="php">// unset cookies
if (isset($_SERVER['HTTP_COOKIE'])) {
    $cookies = explode(';', $_SERVER['HTTP_COOKIE']);
    foreach($cookies as $cookie) {
        $parts = explode('=', $cookie);
        $name = trim($parts[0]);
        setcookie($name, '', time()-1000);
        setcookie($name, '', time()-1000, '/');
    }
}</code>

This code iterates through all available cookies, deleting each one by setting the expiration to a past date and explicitly setting the cookie path to '/'.

For further reference, please consult the PHP documentation on setcookie() at http://www.php.net/manual/en/function.setcookie.php#73484.

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