I found this while perusing the manual thinking about whether or not to install NixOS on my new laptop. It threw me for a loop for a second but as best I can tell this meant to be ".org" like the rest of the example, and not ".com"
In the initial configuration the enablePHP config option is present. In the following abstracted example the commonConfig doesn't include it anymore.
Previous PRs #88505 and #284906 added the enablePHP config option to the commonConfig. @aanderse commented in https://github.com/NixOS/nixpkgs/pull/88505#issuecomment-632575200 the usage of enablePHP shouldn't be encouraged, `services.phpfpm` should be preferred whenever possible. So we remove the enablePHP config from theses examples.