title: Convert .NET syntax into PHP using SoapHeader() call
body: <p>I need to convert this .NET syntax into PHP using SoapHeader() call.</p>
  
  <p>esb.RequestServerVersionValue = new RequestServerVersion();
  esb.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2007_SP1;</p>
  
  <p>Thanks a lot! :)</p>