if ((eval "$cells[$extract_col] $filter_array[$i][1] $filter_array[$i][2]"))

##</code><code>##

if ((eval '$cells[$extract_col] ' . $filter_array[$i][1] . ' $filter_array[$i][2]'))

##</code><code>##

print OUTFILE "$cells[$extract_col]", "\n";

##</code><code>##

print OUTFILE $row, "\n";