我用这个(改编自
Codeigniter Forums - Nicer Dates
):
if( ! function_exists('relative_time'))
{
function relative_time($datetime)
{
if(!$datetime)
{
return "no data";
}
if(!is_numeric($datetime))
{
$val = explode(" ",$datetime);
$date = explode("-",$val[0]);
$time = explode(":",$val[1]);
$datetime = mktime($time[0],$time[1],$time[2],$date[1],$date[2],$date[0]);
}
$difference = time() - $datetime;
$periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
$lengths = array("60","60","24","7","4.35","12","10");
if ($difference > 0)
{
$ending = 'ago';
}
else
{
$difference = -$difference;
$ending = 'to go';
}
for($j = 0; $difference >= $lengths[$j]; $j++)
{
$difference /= $lengths[$j];
}
$difference = round($difference);
if($difference != 1)
{
$period = strtolower($periods[$j].'s');
} else {
$period = strtolower($periods[$j]);
}
return "$difference $period $ending";
}
}