php - angularJS - POST array after JSON.stringify() -

i want post 3 parameters php web service. 1 of array, used json.stringify() first , added parameter. problem is, php isn't receiving stringify'ed parameter.

my array created fetching ids of each element in object.

converting string:

var cid = json.stringify(cids); 

output in console cid:

["1","2","3"] 

and $http.post call:

var dataobj = {     wid: wid,     type: type,     cid: cid };  $http.post("my.php", dataobj); 

from understand, array gets converted string, must posted alike other strings, when echo $_post['cid'], turns out blank; while wid & type proper.

from understanding post data converted json anyway. manually changing array json , including same as:

$http.post("my.php", {         wid: wid,         type: type,         cid: [1, 2, 3]     } 

at other side of connection json converted objects(arrays) if possible. php doesn't print because arrays aren't converted strings well. although should expect string 'array'. try echo'ing $_post['cid'][0]

edit:
stated in comments , this post following code required php , angularjs play together:

$postdata = file_get_contents("php://input"); $request = json_decode($postdata);