$| = 1; #clear buffer

$CGI::POST_MAX=1024*10;    # maximum data to accept in one post request is 10k, prevent buffer overflow
$CGI::DISABLE_UPLOADS = 1; # make sure that no data can be temporarily stored on the server

delete @ENV{ qw(IFS CDPATH ENV BASH_ENV) }; # remove environmental information
$ENV{PATH}="";          # make PATH defined to prevent undef errors
$ENV{CDPATH}="";        # make CDPATH defined to prevent undef errors
$ENV{ENV}="";           # make ENV defined to prevent undef errors
$ENV{BASH_ENV}="";      # make BASH_ENV defined to prevent undef errors