方式一
list($millisecond, $second) = explode(' ', microtime());
$time = (float) (floatval($millisecond) + floatval($second)) * 1000;
echo substr($time, 0, 13)
方式二
echo substr(microtime(true) * 1000, 0, 13);
list($millisecond, $second) = explode(' ', microtime());
$time = (float) (floatval($millisecond) + floatval($second)) * 1000;
echo substr($time, 0, 13)
echo substr(microtime(true) * 1000, 0, 13);