PHP-マイクロ秒():現在のUnixタイムスタンプをマイクロ秒に戻します.

 microtime ( bool $as_float = false ) : string|float

function microtime_float()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);
}

$time_start = microtime_float();

// Sleep for a while
usleep(100);

$time_end = microtime_float();
$time = $time_end - $time_start;

echo "Did nothing in $time seconds\n";

$time_start = microtime(true);

// Sleep for a while
usleep(100);

$time_end = microtime(true);
$time = $time_end - $time_start;

echo "Did nothing in $time seconds\n";

// Randomize sleeping time
usleep(mt_rand(100, 10000));

// As of PHP 5.4.0, REQUEST_TIME_FLOAT is available in the $_SERVER superglobal array.
// It contains the timestamp of the start of the request with microsecond precision.
$time = microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"];

echo "Did nothing in $time seconds\n";

import time as py_time
import datetime

def microtime(get_as_float=False):
    d = datetime.now()
    t = py_time.mktime(d.timetuple())
    if get_as_float:
        return t
    else:
        ms = d.microsecond / 1000000.
        return '%f %d' % (ms, t)