Note: I wouldn't put this on a public host for now, there are probably bugs!
Also, the last commit was 2 years ago, so I don't think it's actively maintained.
That being said, if you clone it and build it and install it for your Apache host, you can likely use Dart in Apache:
If you go the other how to access PHP code from dart client, how to implement it?
Easiest is to decide on an intermediate representation, such as XML or JSON.
Then write POST handlers in PHP, and POST to your Apache/PHP server from your Dart client.