CGI::Session::ID::incr

    use CGI::Session;
    $session = CGI::Session->new("id:Incr", undef, {
                                Directory   => '/tmp',
                                IDFile      => '/tmp/cgisession.id',
                                IDInit      => 1000,
                                IDIncr      => 2 });

CGI::Session::ID::incr is to generate auto incrementing Session IDs. Compare it with CGI::Session::ID::md5, where session ids are truly random 32 character long strings. CGI::Session::ID::incr expects the following arguments passed to CGI::Session->new() as the third argument.

IDFile

Location where auto incremented IDs are stored. This attribute is required.

IDInit

Initial value of the ID if it's the first ID to be generated. For example, if you want the ID numbers to start with 1000 as opposed to 0, that's where you should set your value. Default is 0.

IDIncr

How many digits each number should increment by. For example, if you want the first generated id to start with 1000, and each subsequent id to increment by 10, set IDIncr to 10 and IDInit to 1000. Default is 1.

For support and licensing information see CGI::Session