PHP Licensing

[EGONick]

I'm currently developing a PHP licensing system which is currently working fine but at present it's checking the license data each time a page is loading and as I'm using the fsockopen function to send and receive the license data from the server it's taking quite a while to do so.

I've thought a few alternatives such as cron jobs to update the license and requesting the license at login but I'm not sure that's the best way and I know from experience adding a cron job can be a pain.  Another thought was just to check at login but still not sure if that's the best method.

 

I've been searching around for techniques of doing this but of course, most software like this is all encrypted so I suppose it's a case of common sense but I can't seem to think of a suitable technique to check the license.

 

Is there anyone that can help?  It would be greatly appreciated.

Thanks.