Send data between php and dart

Is localhost:8080 serving both the static Dart (as JS), and the php? If not, you're likely coming across the access-control-allow-origin issue (which is a browser security issue).

This prevents one site posting date to another site.

Work-arounds:

1. Ensure that the site serving php returns the correct CORS headers: http://enable-cors.org/server.html
2. Serve the static Dart/JS files from the same URL (localhost:8080)

For more information, read these:

• https://developer.mozilla.org/en-US/docs/HTTP/Access_control_CORS
• CORS with Dart, how do I get it to work?
• Creating a bot/crawler

Update Workaround 3 is described here (for Chrome / Dartium): https://groups.google.com/a/dartlang.org/d/msg/misc/kg13xtD7aXA/uxeXXrw3CG8J

You can add the parameter "--disable-web-security" to chrome.exe to disable cross domain check.

(Of course, this is only useful while you are developing)

To read the response, you have to put your code in a callback on readyStateChange :

var req = new HttpRequest();req.open('post','http://localhost:8080/darttest/server.php',true);req.on.readyStateChange.add((e){  if (req.readyState == HttpRequest.DONE && req.status == 200){    print(req.responseText);  }});req.send(jsondata);

With your code the http request was not processed when you tried to read the response. You have to wait the completion of the request to read the response.

this is not sending data between dart and php. this is sending data from dart to php!!!