The PHP implementation was released at precise minutes/hours/days/months ago etc.

/*
 * Precise time interval function
 * $time release time such as 1356973323
 * $str output format such as Y-m-d H:i:s
 * The number of seconds in half a year is 15552000, and 1 year is 31104000, used here Half a year's time
 */
function from_time($time,$str){
 isset($str)?$str:$str='m-d';
 $way = time() - $time;
 $r = '';
 if($way < 60){
 $r = 'just';
 }elseif($way >= 60 && $way <3600){
 $r = floor($way/60 ).'minutes ago';
 }elseif($way >=3600 && $way <86400){
 $r = floor($way/3600).'hours ago';
 }elseif($way > =86400 && $way <2592000){
 $r = floor($way/86400).'天前';
 }elseif($way >=2592000 && $way <15552000){
 $r = floor ($way/2592000).'months ago';
 }else{
 $r = date("$str",$time);
 }
 return $r;
}