Date and time with ms in GMT+8

datetime.php

<?php 
function datetime() {
	date_default_timezone_set('Asia/Singapore');
	$microtime = explode(" ",microtime());
	$time = (int)$microtime[1];
	$milliseconds = round($microtime[0]*1000);
	$milliseconds = sprintf("%03d", $milliseconds);
	$datetime = date('Y-m-d H:i:s',$time).'.'.$milliseconds;
	return $datetime;
}