Although $core_v2_page provides a mechanism for reading querystring and posted form values, these methods should only be used by a widget when that widget was the one adding the querystring or posted form values.  

  1. Only read querystring and posted form values directly within a widget when that widget was the one that added the querystring or post values.
  2. For other data identified on the querystring, use the API and Current properties exclusively.  This will allow the URL formats to be changed without adjusting scripted widget implementations.