I have a cronjob triggering a php script that takes several minutes to accomplish. I need to prevent multiple triggering by the cronjob mulfunctioning. So I would like a clean way to know how many instances of a certain php are currently working on the server. is there a server variable for that? if not, how do I know (via php) how many concurrent accesses are there to a certain php page? for example in mysql (the "SHOW PROCESSLIST" command), but I need a similar function for the php page iself.
thank you for your help