jqgrid problem:Where is the "filter" param?

Am curently looking at the jqgrid documentation on advanced search and specifically search_adv.php file that comes with it.

I have noted the following line of code

$searchstr = Strip($_REQUEST['filters']);

However when I look at the output on firebug of my jqgrid post I s开发者_C百科ee

_search         true
nd              1270148130165
page            1
rows            10
searchField     income_types_desc
searchOper      eq
searchString    5
sidx            income_types_desc
sord            asc

Where on earth is the "filter" param?

The filter param is used when you perform an advanced (allowMultiple:true) search. It ends up containing a JSON object, which looks something like this:

filters = 
    {"groupOp":"AND",
     "rules":[
       {"field":"invdate","op":"ge","data":"2007-10-06"},
       {"field":"invdate","op":"le","data":"2007-10-20"}, 
       {"field":"name","op":"bw","data":"Client 3"}
      ]
    }

http://www.trirand.com/jqgridwiki/doku.php?id=wiki:advanced_searching