JQuery :: Know The Value Of Both PHP-Values, They Come From A Database?

i have many inputs like:

<input type="hidden" name="combi[<?php echo $sysCompData['combi_id'];?>][desc_features]" value="<?php echo $sysCompData['desc_features'];?>">

I do not know the value of both PHP-Values, they come from a database. I have tried now some hours to grab the values of this array, because i have to compare them to other values in similar inputs. But I simply do not know how? For a simple test i simply want to change the value of the chosen fields. I tried (nearly) everything from something like $("input[name='combi']").val('test'); to $("input[name='combi'//[//]//[//]]").val('test'); . In PHP I have absolutely no problem, i go simply through the arrays with:

<?php foreach ($combi as $i => $combiData): ?>

How can I manage this with jquery?