PHP4 and sessions

I know this is the developers list, but I thought you guys might be able to answer my question.... I know that PHP4 will be able to handle sessions, but will it be able to handle sessions without cookies? The reason I ask this is that I come from a Cold Fusion background where there is a method of sessions without cookies (alhtough it involves attaching a CFTOKEN to form and URL variables) which means that all session variables can be maintained.. Just curious before I start on a big project and start putting in all the variables in to URLs and Forms. Thanks Ade