人性化的时间格式

function cus_date($datetemp, $dstr = 'Y-m-d H:i') {
	$timezone = Option::get('timezone');
	$op = '';
	$sec = time() - $datetemp;
	$hover = floor($sec / 3600);
	if ($hover == 0) {
		$min = floor($sec / 60);
		if ($min == 0) {
			$op = $sec . ' 秒前';
		} else {
			$op = "$min 分钟前";
		}
	} elseif ($hour < 24) {
		$op = " $hour 小时前";
	} else {
		$op = gmdate($dstr, $datetemp + $timezone * 3600);
	}
	return $op;
}