PHP error calling thrift method

[Balanagireddy Mudiam]

Hi,

I am having the below request object and I am calling a method using
thrift from php.

 struct MyRequest {
   1: set<string> name,
   2: i32 startDate,
   3: i32 endDate,
 }

When I execute my php, I get the following error. This warning is
thrown from thrift generated code. The reason for the warning is
$elem21(object) cannot be used as a key.

Warning: Illegal offset type in Server.php on line 226

223               $elem21 = null;
224               $elem21 = new MyResponse();
225               $xfer += $elem21->read($input);
226               $this->success[$elem21] = true;

Any idea, how to resolve this issue.

Thank you.

Regards
Bala Mudiam