Re: How to make a script sleep for 5 seconds?
| From: | Peter Brodersen | Date: | Tue, 31 May 2005 02:17:51 +0000 |
| Subject: | Re: How to make a script sleep for 5 seconds? | ||
| References: | 1 2 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-216019@lists.php.net to get a copy of this message | ||
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?
Easy:
<?php
for($i=0;$i<5;$i++) sleep(1);
?>
Or better:
<?php
$endtime = time()+5;
while (time() != $endtime);
?>
Or even better:
<?php
$endtime = time()+5;
while (
date +%s != $endtime);
?>
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