It comes with well working Apache and IIS bindings by default; the Windows package contains a large number of compiled extensions; a fair set of Windows-specific extensions are enabled by default (including support for COM and .NET interfacing, for instance); command-line PHP (for e.g. Composer or Symfony) works just fine; most if not all posix-ish builtin functions have good Windows implementations.
Also, the built-in HTTP server that was added in PHP 5.4 works just fine on Windows. Really, I have no idea what you're talking about.
That said, I've never looked into whether PHP is as performant or secure on Windows.