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

On Mon, 2005-05-30 at 23:17, Richard Lynch 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? Mr. Lynch, either intentionally or inadvertently, you have succeeded in making me spray water out my nose as I happened to be drinking a glass of it when I read your reply :B > > 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? Definitely a PEAR candidate, but we should ensure it requires the compatibility suite. Cheers, Rob. -- .------------------------------------------------------------. | InterJinn Application Framework - http://www.interjinn.com | :------------------------------------------------------------: | An application and templating framework for PHP. Boasting | | a powerful, scalable system for accessing system services | | such as forms, properties, sessions, and caches. InterJinn | | also provides an extremely flexible architecture for | | creating re-usable components quickly and easily. | `------------------------------------------------------------'