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	Last updated: Fri, 22 Jun 2007

usleep

(PHP 3, PHP 4 , PHP 5)

usleep -- Delay execution in microseconds

Description

void usleep ( int micro_seconds)

The usleep() function delays program execution for the given number of micro_seconds. A microsecond is one millionth of a second.

例子 1. usleep() example

<?php // Current time echo date('h:i:s') . "\n"; // wait for 2 secondes usleep(2000000); // back! echo date('h:i:s') . "\n"; ?>
This script will output :
11:13:28 11:13:30

注: This function did not work on Windows systems until PHP 5.0.0

See also sleep() and set_time_limit().

add a note User Contributed Notes
usleep

beidson at calpoly dot edu
14-Sep-2000 02:18

Since USLEEP doesn't work under windows, you need to come up with your own
fix.  This little function will do the trick.



function
wait($usecs){

  $temp=gettimeofday();

 
$start=(int)$temp["usec"];

  while(1){

   
$temp=gettimeofday();

    $stop=(int)$temp["usec"];

   
if ($stop-$start >= $usecs) break;

  }

}



The smallest
amount of time it seems to work with is around 200usecs, but if you wait()
anything higher than 200usecs it's pretty close.

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unpack	mnoGoSearch

	Last updated: Fri, 22 Jun 2007

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