Cookies in PHP (Remember Me Feature)

Cookies are small pieces of data stored in the browser.

Cookies vs Sessions (clear difference)

- Session: stored on server, browser has only the session id - Cookie: stored on browser, sent with every request to your domain

Setting a cookie

```php setcookie("theme", "dark", time() + 60 * 60 * 24 * 30, "/"); ```

That stores `theme=dark` for 30 days.

Reading a cookie

```php if (isset($_COOKIE["theme"])) { echo "Theme: " . $_COOKIE["theme"]; } ```

Deleting a cookie

```php setcookie("theme", "", time() - 3600, "/"); ```

Security note (very important)

Never store sensitive info directly in cookies (like password). If you do “remember me”, store a random token and validate it on server.

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