Description:
------------
The filter variable is not reset properly (filter_flags is, however). This results in the possibility of a variable using the filter type of the previous variable.

Reproduce code:
---------------
Using http://pecl.php.net/~pierre/filter_input_get_args_example.phps, and removing 'component's filter type:

$args = array(
    'product_id'    => FILTER_SANITIZE_ENCODED,
    'component'     => array('flags'    => FILTER_FLAG_ARRAY, 
                             'options'    => array("min_range"=>1, "max_range"=>10)
                        ),
);

Will result in the FILTER_SANITIZE_ENCODED filter being applied to 'component' instead of FILTER_DEFAULT.

Solution:

Add filter = FILTER_DEFAULT; above filter_flags = 0;