Migration

General

Update your version of this library using Composer and its composer update or composer require commands [?].

The default domain scope for new Cookie instances is still the current host, but it does not include subdomains anymore, unless explicitly specified otherwise via the Cookie#setDomain method.
For the domain scope, www subdomains are not automatically widened to the bare domain anymore. If you want to include the bare domain and all subdomains in addition to the www subdomain, you must now explicitly specifiy the bare domain instead of the www subdomain as the scope.
When managing sessions via the methods Session#start or Session#regenerate, the session configuration is now correctly respected with regard to whether subdomains should be included in the domain scope or not. The scope is not automatically widened to include subdomains anymore.
The second parameter of the Cookie#setDomain method, which was named $keepWww, has been removed.
When creating Cookie instances from a string using the Cookie#parse method, the source’s decision of whether to include subdomains in the domain scope or not is now correctly respected. The scope is not automatically widened to include subdomains anymore.