In laravel, we can get the input value via Input::get(\'inputname\'). I try to change the value by doing this Input::get(\'inputname\') = \"new value\";>
Input::get(\'inputname\')
Input::get(\'inputname\') = \"new value\";>
Try this,it will help you.
$request->merge(array('someIndex' => "yourValueHere"));