gettimeofday

(PHP 4, PHP 5)

gettimeofday — Get current time

Description

mixed gettimeofday ([ bool $return_float ] )

This is an interface to gettimeofday(2). It returns an associative array containing the data returned from the system call.

Parameters

return_float: When set to TRUE, a float instead of an array is returned.

Return Values

By default an array is returned. If return_float is set, then a float is returned.

Array keys:

"sec" - seconds since the Unix Epoch
"usec" - microseconds
"minuteswest" - minutes west of Greenwich
"dsttime" - type of dst correction

ChangeLog

Version	Description
5.1.0	The `return_float` parameter was added.

Examples

Example #1 gettimeofday() example


<?php
print_r(gettimeofday());

echo gettimeofday(true);
?>

The above example will output something similar to:

Array
(
    [sec] => 1073504408
    [usec] => 238215
    [minuteswest] => 0
    [dsttime] => 1
)

1073504408.23910

add a note User Contributed Notes
gettimeofday

lucas dot karisny at linuxmail dot org
14-Feb-2005 03:26


A small improvement on getTimer.  Using vsprintf instead of sprintf there is no need to assign the array:



<?php

function utime()

{

  return (float) (vsprintf('%d.%06d', gettimeofday()));

}

?>



In a test on my machine getTimer took 0.037519 seconds to run through 1000 iterations versus 0.027912 seconds for utime.  In total, utime runs about 25% quicker.  The use is negligible in an actual benchmarking scenario, but this could provide a slightly more accurate estimate.  Of course the time it takes to run the function could always be stored at the start and subtracted from your total value each time it is run.

middleto at pilot dot msu dot edu
13-Aug-1999 04:49


The types of DST correction (from sys/time.h on a Linux system):


 0     Not on DST


 1     USA DST


 2     Austrailian DST


 3     Western European DST


 4     Middle European DST


 5     Eastern European DST


 6     Canada DST


 7     Great Britain and Eire DST


 8     Rumania DST


 9     Turkey


10     Australian DST (with shift in 1986)

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gmdate

getdate

Last updated: Fri, 22 Aug 2008