php.net:

Few weeks ago the manual was restructured, hopefully improving navigation and making room for per-extension chapters and usage examples along with improved documentation for object oriented extensions. Most noticable changes are the function reference, predefined variables, context options and parameters and predefined exceptions manul pages, which we would really appreciate feedback on. Now with the upcomming PHP5.3 release, which introduces several major features such as namespaces, closures, late static bindings, internationalization functions, INI sections, Phar..., we would really appreciate any and all help we can get improving the documentations. In related news, the manual was relicensed recently and is now covered by the CreativeCommons Attribution license.