尝试在PHP中获取非对象的属性适用于iOS但不适用于android

Question

I am using Android Facebook SDK to get facebook friends.

After getting facebook friends I am sending it in a JSON string as input to PHP web service as given below.

JSON input

{
  "data": [
    {
      "fbUsername": "test",
      "is_app_user": "false",
      "name": "test",
      "pic_square": "https:\/\/fbcdn-profile-a.akamaihd.net\/hprofile-ak-prn2\/t5.0-1\/test.jpg",
      "uid": "456464515482",
      "userId": "42"
    }
  ]
}

When I send it via iOS appliation it works fine, but if I send it via Android it's not getting decoded from web service end.

PHP web service code is given below.

$post_body = file_get_contents('php://input');
$reqData[] = json_decode($post_body);
$userdata = $reqData[0];

In android data I am getting data in $post_body but not decoded in $reqData. But it works well in iOS application.

I am getting error as given below.

@$error=0;
$friendsArray = $userdata->data; // Line number 645

foreach ($friendsArray as $fbUser) // Line number 647
{
  .....
}
// where $userdata = $reqData[0];

Can anybody please suggest me what is the wrong with my coding?

Thanks in advance.