Limit on resource IDs? (slightly OT)

Just wondering if there's a limit on the number of resource IDs available to PHP. That is, if I had a console script that was constantly allocating and deallocating resources (say, socket file descriptors and socket objects, for instance), will there be a point when the PHP just can't create any more resources? These resources won't be used concurrently, of course, since they're constantly being built and then destroyed, but will there be a point, say if the script was running constantly for a few days, where PHP will just refuse to allow any more resource IDs? Or will the resource IDs eventually wrap around once they hit a boundary, say 32767, wrapping around to -32767 or 1? I'm just curious because I have a small experiment going on here involving a streaming server written in PHP that uses the sockets extension and is constantly creating and destroying sockets, which use resource IDs. I thought about posting to php.general, but this seems to be a bit deeper than the usual fare I see there. I suppose I could look at the PHP/Zend source, but if anybody knows this off-hand, it would make my life easier. Thx. J