I wonder if is posible. I mean to run a script at a specific point in time. Or could somewone give me an other solution for this problem: I have a script and when he finish the job i need to run it again with an other parameter. The number of re-run is variable so i don't wana use a loop because i get a low memory error. I raise the value of memory usage from php or max time time to run a script but until when (i mean if i must run the script for 1000 times)