Re: Re: How to make a script sleep for 5 seconds?

On 5/31/05, Richard Lynch <ceo@l-i-e.com> wrote: > On Mon, May 30, 2005 7:17 pm, Peter Brodersen said: > > On Mon, 30 May 2005 21:08:29 -0400, in php.general > > robert@interjinn.com (Robert Cummings) wrote: > > > >>Sorry to hijack this thread but I was wondering how to make a script > >>sleep for 5 seconds? > > sleep(5); > > > Easy: > > <?php > > for($i=0;$i<5;$i++) sleep(1); > > ?> > > > > Or better: > > <?php > > $endtime = time()+5; > > while (time() != $endtime); > > ?> > > This runs the risk of somebody adding some code in there that takes longer > than a second to run, and then suddenly it's in an infinite loop because > the $endtime is never EQUAL to time() > > Safe to say while (time() <= $endtime) > > > Or even better: > > <?php > > $endtime = time()+5; > > while (date +%s != $endtime); > > Gak! > > Why would you shell out to do this? Because you can :) > > > ?> > > > > We have busy wait, we have risk of indefinite loops. The next step > > should be (more) imprecision. Maybe read /proc/cpuinfo and perform n > > steps of simple loop where n is calculated from the cpu type, mhz and > > current load. Maybe a PEAR project? > > > > -- > > - Peter Brodersen > > > > -- > > PHP General Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > -- > Like Music? > http://l-i-e.com/artists.htm > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > >