Atomic Time
This function will return the timestamp of the current atomic as set by the atomic clock at time-a.netst.gov. The returned unix timestamp value can be used with the date function to format the date in any human readable format.
<?php
/**
*
* @Get atomic time
*
* @throws Exception of failure
*
* @return int
*
*/
function atomicTime()
{
/*** connect to the atomic clock ***/
$fp = @fsockopen( "time-a.nist.gov", 37, $errno, $errstr, 10 );
if ( !$fp )
{
throw new Exception( "$errno: $errstr" );
}
else
{
fputs($fp, "\n");
$time_info = fread($fp, 49);
fclose($fp);
}
/*** create the timestamp ***/
$atomic_time = (abs(hexdec('7fffffff') - hexdec(bin2hex($time_info)) - hexdec('7fffffff')) - 2208988800);
echo $errstr;
return $atomic_time;
}
?>
Example Code
<?php
try
{
/*** get the timestamp ***/
$atomic_time = atomicTime();
/*** format the time ***/
echo date('Y M d H:i:s', $atomic_time);
}
catch(Exception $e)
{
echo $e->getMessage();
}
?>