how to delete all cookies of my website in php
Taken from that page, this will unset all of the cookies for your domain:
// unset cookiesif (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, '/'); }}
$past = time() - 3600;foreach ( $_COOKIE as $key => $value ){ setcookie( $key, $value, $past, '/' );}Even better is however to remember (or store it somewhere) which cookies are set with your application on a domain and delete all those directly.
That way you can be sure to delete all values correctly.