[htdig] trying to use 'matches_per_page' variable

[Byungjin]

I am using htdig by calling it's own page when searching. - using $query = "config=$config&----"            $command="/tmp/prog/htdig.sh $query";            exec($command,$result);                     <-- php coding.   However, when I try to use 'matches_per_page' in '$query', it does not recognize that variable.   How do I go about changing the maximum number of matches displayed per page?